Download Volvo Penta TAMD70D Technical data

Workshop Manual
Engine
D
2(0)
TAMD61A, TAMD62A, TAMD63L-A, TAMD63P-A
TAMD71A, TAMD71B, TAMD72A, TAMD72P-A,
TAMD72WJ-A
Group 21 Engine body
Marine engines
TAMD61A • TAMD62A • TAMD63L-A • TAMD63P-A
TAMD71A • TAMD71B • TAMD72A • TAMD72P-A
TAMD72WJ-A
Contents
General instructions ............................................
2
Special tools ........................................................ 9
Other special equipment .....................................
Design and function
Engine, generally .................................................
Design differences, engine versions ...................
Identification signs ..............................................
Location of type approval plates .........................
Component description .......................................
Repair instructions
General ...............................................................
Engine jig attachment .........................................
Condition test, engine .........................................
Compression test ................................................
Cylinder head, renovation ...................................
Cylinder head, removal .......................................
Cylinder head, stripping/assembly .......................
Cylinder head, leakage test .................................
Cylinder head, inspection ....................................
Valve guides, inspection .....................................
Valve guides, replacement ..................................
Cylinder head, planing .........................................
Cylinder head, milling the seal groove .................
Valve seat, replacement .....................................
Valve seat, grinding ............................................
Valves, grinding ..................................................
Rocker mechanism, renovation ...........................
Checking the valve springs .................................
Cylinder head, assembly .....................................
Copper injector sleeve, replacement ...................
Cleaning seat for copper sleeve ..........................
Copper sleeve, assembly ....................................
Valves, adjustment .............................................
Cylinder block, renovation ..................................
Piston and con rod, removal ...............................
Piston and con rod, inspection ............................
12
13
14
15
15
24
30
31
32
32
32
32
34
35
37
38
38
39
39
42
43
44
44
46
46
48
49
50
52
53
53
54
Piston removal, gudgeon pin boss
replacement ........................................................
Piston, assembly ................................................
Piston ring inspection and fit ...............................
Piston ring assembly ..........................................
Cylinder liner, inspection and measurement ........
Cylinder liner, disassembly .................................
Cylinder liner, honing ...........................................
Cylinder liner position, renovation ........................
Cylinder liner, assembly ......................................
Piston assembly .................................................
Timing gears, disassembly .................................
Timing gears, assembly ......................................
Sealant application, timing gear lid ......................
Seal ring, polygon hub, replacement ...................
Polygon hub, assembly .......................................
Camshaft, wear check ........................................
Camshaft, disassembly ......................................
Inspection of valve lifters and camshaft ..............
Camshaft, measurement .....................................
Camshaft bearing, replacement ...........................
Camshaft, assembly ...........................................
Crankcase, disassembly .....................................
Inspection, crankshaft and bearings ....................
Crankshaft, renovation ........................................
Cylinder block, inspection ...................................
Cylinder block, planing ........................................
Crankshaft, assembly .........................................
Big end bearings, replacement ............................
Main bearings, replacement ................................
Flywheel, replacement ........................................
Gear ring, replacement ........................................
Flywheel, indication .............................................
Flywheel housing, indication ...............................
Crankshaft seal, rear, replacement ......................
Flange seal, flywheel housing,
replacement ........................................................
54
55
56
56
57
57
58
59
60
61
62
65
66
66
67
67
68
69
70
70
71
71
72
74
75
75
76
77
78
80
81
82
82
83
83
Safety information
Introduction
This Workshop Manual contains technical data, descriptions and repair instructions for Volvo Penta products or product versions contained in the contents
list. Ensure that the correct workshop literature is being used.
Read the safety information and the Workshop Manual “General Information” and “Repair Instructions” carefully before starting work.
personal injury. Avoid burns. Take precautions
to avoid hot surfaces (exhausts, turbochargers,
charge air pipes and starter elements etc.) and
liquids in supply lines and hoses when the engine is running or has been turned off immediately
prior to starting work on it. Reinstall all protective parts removed during service operations before starting the engine.
Check that the warning or information decals on
the product are always clearly visible. Replace
decals that have been damaged or painted over.
Engine with turbocharger: Never start the engine
without installing the air cleaner (ACL). The rotating compressor in the turbocharger can cause
serious personal injury. Foreign objects entering
the intake ducts can also cause mechanical damage.
Important
In this book and on the engine you will find the following special warning symbols.
WARNING! If these instructions are not followed
there is a danger of personal injury, extensive
damage to the product or serious mechanical
malfunction.
IMPORTANT! Used to draw your attention to something that can cause damage, product malfunction or damage to property.
NOTE! Used to draw your attention to important information that will facilitate work or operations.
Below is a summary of the risks and safety precautions you should always observe or carry out when
operating or servicing the engine.
Immobilize the engine by turning off the power
supply to the engine at the main switch (-switches) and lock it (them) in the OFF position before starting work. Set up a warning notice at the
engine control point or helm.
Generally, all servicing should be carried out
with the engine switched off. Some work (carrying out certain adjustments for example) requires the engine to be running. Approaching a
running engine is dangerous. Loose clothing or
long hair can fasten in rotating parts and cause
serious personal injury.
If working in proximity to a running engine, careless movements or a dropped tool can result in
2
Never use start spray or similar to start the engine. The starter element may cause an explosion
in the inlet manifold. Danger of personal injury.
Avoid opening the filler cap for engine coolant
system (freshwater cooled engines) when the
engine is still hot. Steam or hot coolant can
spray out. Open the coolant filler cap carefully
and slowly to release pressure before removing
the cap completely. Take great care if a cock,
plug or engine coolant line must be removed
from a hot engine. It is difficult to anticipate in
which direction steam or hot coolant can spray
out.
Hot oil can cause burns. Avoid skin contact with
hot oil. Ensure that the lubrication system is not
under pressure before commencing work on it.
Never start or operate the engine with the oil filler cap removed, otherwise oil could be ejected.
Stop the engine and close the sea cock before
carrying out operations on the engine cooling
system.
Start the engine only in a well-ventilated area. If
operating the engine in an enclosed space, ensure that exhaust gases and crankcase ventilation emissions are extracted from the working
area.
Always use protective goggles where there is a
danger of pieces of metal, sparks from grinding,
acid or other chemicals being thrown into your
eyes. Your eyes are very sensitive, injury can
lead to loss of sight!
Safety information
Avoid skin contact with oil. Long-term or repeated contact with oil can remove the natural oils
from your skin. The result can be irritation, dry
skin, eczema and other skin problems. Used oil
is more dangerous to health than new oil. Use
protective gloves and avoid oil soaked clothes
and rags. Wash regularly, especially before meals. Use the correct barrier cream to prevent dry
skin and to make cleaning your skin easier.
Most chemicals used in products (engine and
transmission oils, glycol, petrol and diesel oil)
and workshop chemicals (solvents and paints)
are hazardous to health Read the instructions on
the product packaging carefully! Always follow
safety instructions (using breathing apparatus,
protective goggles and gloves for example). Ensure that other personnel are not unwittingly exposed to hazardous substances (by breathing
them in for example). Ensure that ventilation is
good. Handle used and excess chemicals according to instructions.
Be extremely careful when tracing leaks in the
fuel system and testing fuel injection nozzles.
Use protective goggles! The jet ejected from a
fuel injection nozzle is under very high pressure,
it can penetrate body tissue and cause serious
injury There is a danger of blood poisoning.
All fuels and many chemicals are inflammable.
Ensure that a naked flame or sparks cannot ignite fuel or chemicals. Combined with air in certain ratios, petrol, some solvents and hydrogen
from batteries are easily inflammable and explosive. Smoking is prohibited! Ensure that ventilation is good and that the necessary safety precautions have been taken before carrying out
welding or grinding work. Always have a fire extinguisher to hand in the workplace.
Store oil and fuel-soaked rags and fuel and oil
filters safely. In certain conditions oil-soaked
rags can spontaneously ignite. Used fuel and oil
filters are environmentally dangerous waste and
must be deposited at an approved site for destruction together with used lubricating oil, contaminated fuel, paint remnants, solvent, degreasing agents and waste from washing parts.
Never expose the batteries to a naked flame or
electric sparks . Never smoke in proximity to
the batteries. The batteries give off hydrogen
gas during charging which when mixed with air
can form an explosive gas - oxyhydrogen. This
gas is easily ignited and highly volatile. Incorrect connection of the battery can cause a spark
which is sufficient to cause an explosion with resulting damage.
Do not disturb battery connections when starting
the engine (spark risk) and do not lean over batteries.
Never mix up the positive and negative battery
terminals when installing. Incorrect installation
can result in serious damage to electrical equipment. Refer to wiring diagrams.
Always use protective goggles when charging
and handling batteries. The battery electrolyte
contains extremely corrosive sulfuric acid. If
this comes into contact with the skin, wash immediately with soap and plenty of water. If battery acid comes into contact with the eyes, immediately flush with copious amounts of water
and obtain medical assistance.
Turn off the engine and turn off power at main
switch(es) before carrying out work on the electrical system.
Clutch adjustments must be carried out with the
engine turned off.
Use the lifting eyes mounted on the engine/reverse gear when lifting the drive unit.
Always check that lifting equipment is in good
condition and has sufficient load capacity to lift
the engine (engine weight including reverse gear
and any extra equipment installed).
To ensure safe handling and to avoid damaging
engine components on top of the engine, use a
lifting beam to raise the engine. All chains and
cables should run parallel to each other and as
perpendicular as possible in relation to the top of
the engine.
If extra equipment is installed on the engine
altering its center of gravity, a special lifting device is required to achieve the correct balance
for safe handling.
Never carry out work on an engine suspended
on a hoist.
3
Safety information
Never remove heavy components alone, even
where secure lifting equipment such as secured
blocks are being used. Even where lifting equipment is being used it is best to carry out the
work with two people; one to operate the lifting
equipment and the other to ensure that components are not trapped and damaged when being
lifted.
When working on-board ensure that there is sufficient space to remove components without
danger of injury or damage.
Components in the electrical system, ignition
system (gasoline engines) and fuel system on
Volvo Penta products are designed and constructed to minimize the risk of fire and explosion. The engine must not be run in areas where
there are explosive materials.
4
Always use fuels recommended by Volvo Penta. Refer to the Instruction Book. The use of lower quality fuels can damage the engine. On a
diesel engine poor quality fuel can cause the
control rod to seize and the engine to overrev
with the resulting risk of damage to the engine
and personal injury. Poor fuel quality can also
lead to higher maintenance costs.
WARNING! The engine has pretensioned delivery lines. These pipes must under no circumstances be bent. Damaged pipes should be replaced.
Observe the following rules when cleaning with
high-pressure water jets: Never direct the water
jet at seals, rubber hoses or electrical components. Never use a high pressure jet when
washing the engine.
General information
About the service manual
Certified engines
This workshop manual contains technical data, descriptions and repair instructions for the standard
versions of engine units TAMD61A, TAMD62A,
TAMD63L-A, TAMD63P-A, TAMD71A, TAMD71B,
TAMD72A, TAMD72P-A, TAMD72WJ-A.
On engines which are certified in accordance with national and regional regulations (e.g. Bodensee), the
manufacturer guarantees that the requirements are
met by both new engines and engines in service. The
product must be equivalent to the sample which was
approved during certification. In order for Volvo Penta,
as a manufacturer, to guarantee that engines in service meet the stated environmental requirements, the
following requirements for service and spare parts
must be met:
The workshop manual can show the tasks carried out
on any of the engines noted above. This means that
the illustrations and photographs may not coincide in
some cases with other engines. The repair methods
are essentially similar, however. If this is not the
case, it will be noted. Important differences are noted
separately. Engine designations and engine serial
numbers are noted on the type approval sign (please
refer to page 15). In all correspondence about an engine, the engine designation and serial number must
always be given.
The workshop manual has primarily been prepared for
Volvo Penta’s service workshops and their qualified
personnel. It is therefore assumed that people who
make use of the book have basic knowledge of marine propulsion systems and can carry out tasks of a
mechanical/electrical nature which are associated with
the trade.
Volvo Penta continually improves its products, which
means that we reserve the right to make changes. All
information contained in this manual is based on product data which were available at the time the manual
was sent to press. Any major changes made to the
product or service methods after this time are notified
in the form of service bulletins.
Spare parts
Spare parts for electrical systems and fuel systems
are subject to various national safety requirements,
e.g. US Coast Guard Safety Regulations. Volvo
Penta spare parts meet these requirements. No compensation in respect of Volvo Penta guarantees will be
given for any kind of damage or injury caused by the
use of non-original Volvo Penta spare parts on the
product in question.
l
The service intervals and service tasks recommended by Volvo Penta must be observed.
l
Only Volvo Penta original parts, intended for the
certified version of the engine, may be used.
l
Service work related to the ignition system, ignition settings and fuel injection system (petrol
(gasoline)) must always be carried out by an authorised Volvo Penta workshop.
l
The engine must not be changed or modified in
any way, with the exception of the accessories
and service kits developed by Volvo Penta for the
engine.
l
Installation changes on exhaust pipes and air inlet pipes for the engine bay (ventilation ducts)
must not be done without consultation, since this
can affect exhaust emissions.
l
No seals may be changed by unauthorised personnel.
IMPORTANT! When spare parts are required,
use Volvo Penta original spares.
The use of non-original spare parts means
that Volvo Penta is no longer responsible for
ensuring that the engine corresponds with
the certified sample.
No compensation in respect of Volvo Penta
guarantees will be given for any kind of damage
or injury caused by the use of non-original Volvo
Penta spare parts on the product in question.
5
Repair instructions
The work methods described in the Workshop Manual
are applicable for a workshop environment. The
engine is therefore removed from the boat and
mounted in an engine block. Renovation work which
does not require removal of the engine is conducted in
situ with the same work methods, unless otherwise
stated.
The warning symbols used in the Workshop Manual
(see Information on Safety for implication)
WARNING!
IMPORTANT!
NOTE!
These are in no way comprehensive, since we
obviously cannot foresee everything, in that service
work is conducted under the most various conditions.
We can therefore only point out the risks which we
consider can arise as a result of incorrect handling
during work in a well-equipped workshop with work
methods and tools which are proven by us.
In the Workshop Manual all the work procedures for
which there are special Volvo Penta tools are
conducted with these. The special tools are specially
produced to facilitate the most safe and rational work
method possible. It is therefore the responsibility of
persons using other tools or another work method than
that which we recommend to ensure that no risk of
personal injury, material damage or malfunction can
occur.
In some cases there may be special safety
instructions and user instructions for the tools and
chemicals named in the Workshop Manual. These
instructions shall always be followed and there are no
special instructions for this in the Workshop Manual.
By means of taking certain elementary procedures
and using a modicum of common sense, most risk
factors can be prevented. A clean workplace and a
clean engine eliminate many risks both of personal
injury and malfunction.
Especially during work on the fuel system, lubrication
system, induction system, turbo, bearing unions and
sealing unions, it is of the greatest importance that
dirt or foreign particles do not get in, since this can
result in malfunctioning or shorten the repair servicelife.
Our joint responsibility
Each engine consists of a large number of interactive
systems and components. The deviation of a
component from the technical specification can
dramatically increase the environmental impact from
an otherwise first-rate engine. It is therefore of
extreme importance to maintain the given wear
tolerances, that systems capable of adjustment
receive the correct setting, and that Volvo Penta
Genuine Parts are used for the engine. The time
intervals in the engine’s maintenance schedule must
be followed.
Certain systems, e.g. components in the fuel system,
may require special competence and special test
equipment. Certain components are sealed at the
factory for environmental reasons. Work on sealed
components must not be conducted unless authorisation for such work is held.
Remember that most chemical products, incorrectly
used, are hazardous to the environment. Volvo Penta
recommends the use of biologically decomposing
degreasing agents for all cleaning of engine
components, unless otherwise stated in the Workshop
Manual. When working on board a boat pay special
attention to make sure that oils and washing residue
are handled correctly for destruction, and do not
unintentionally end up in the nature, e.g. in the bilgewater.
Tightening torques
Tightening torque for vital unions, which should be
tightened with dynamometric wrenches, is listed in
“Specifications: Tightening torque” and indicated in the
manual’s work descriptions. All torque indications are
applicable for cleaned threads, screw heads and
mating surfaces. The torque indications refer to lightly
oiled or dry threads. If lubricants, locking liquids or
sealants are required for the screw union, the type is
indicated in the work description and in “Tightening
torques”. General tightening torque as per the table
below is applicable for unions where special torque
indications are not given. The torque indication is a
standard value and the union does not require
tightening with a dynamometric wrench.
Size
Tightening torques
M5 .................................................
M6 .................................................
M8 .................................................
M10 ...............................................
M12 ...............................................
M14 ...............................................
6
Nm
6
10
25
50
80
140
lbf.ft
4.4
7.4
18.4
36.9
59.0
103.3
Safety information
Angular tightening torque
For angular tightening torque the screw union is
tightened with a given torque, thereafter further
tightening with a predetermined angle. Example: at
90° angular tightening the union is tightened and an
additional
1/4 turn is made in a work procedure after the given
tightening torque has been reached.
Lock nuts
Dismantled lock nuts shall not be reused but replaced
with new items, since the locking properties diminish
or are lost with repeated use. For lock nuts with
plastic inserts, e.g. Nylock®, the tightening torque
given in the table shall be reduced if the Nylock® nut
has the same nut height as a standard full-metal
hexagonal nut. The tightening torque is reduced by
25% for screw size 8 mm or larger. For Nylock® nuts
with higher nut heights, where the full-metal thread is
equally high as a standard hexagonal nut, the
tightening torque as per the table are applicable.
Strength classes
Screws and nuts are divided into different strength
classes; affiliation is indicated by the marking on the
screw head. A higher number on the marking
represents a stronger material, e.g. a screw marked
10-9 has a higher strength than a screw marked 8-8. It
is therefore important when dismantling screw unions
that the screws are refitted in their original places. For
replacement of screws see the Parts Catalogue to
ensure that the correct version is obtained.
Sealants
A number of different sealants and locking liquids are
used on the engine. The properties of the mediums
differ, and they are intended for different union
strengths, temperature ranges, resistance to oils and
other chemicals, and for the different materials and
column sizes in the engine.
In order to conduct satisfactory service work it is
therefore important that the correct type of sealant
and locking liquids are used for the unions where such
are required.
In the Workshop Manual we have indicated in
respective chapters the agents which are used in our
engine production.
During service work the same agent, or agent with
similar properties but of other manufacture, shall be
used.
When using sealants and locking liquids it is important
that the surfaces are free from oil, grease, paint and
anti-rust agent, and that they are dry.
Always follow the instructions of the manufacturer
concerning application temperature, hardening time
and other instructions for the product.
Two different basic types of agents are used on the
engine, and these are characterised by:
RTV-agent (Room temperature vulcanising). Most
often used with gaskets, e.g. sealing of gasket joints
or applied on gaskets. RTV-agent is fully visible when
the part has been dismantled: old RTV-agent must be
removed before the union is sealed again.
The following RTV-agents are named in the Workshop
Manual: Loctite® 574, Volvo Penta 840879-1,
Permatex®. No. 3, Volvo Penta 1161099-5,
Permatex® No. 77. Old sealant is removed in each
case with denatured spirit.
Anaerobic agents. These agents harden on the
absence of air. The agent is used when two solid
parts, e.g. cast components, are fitted together
without gasket. A common application is also to
secure and seal plugs, threads on pin bolts, taps, oil
pressure relays, etc. Hardened anaerobic agents are
transparent and therefore they are coloured to make
them visible. Hardened anaerobic agents are very
resistant to solvents and old agent cannot be
removed. Careful degreasing is conducted prior to
refitting, and new sealant is applied.
The following anaerobic agents are named in the
Workshop Manual: Loctite® 572 (white), Loctite® 241
(blue).
NOTE! Loctite® is a registered trade-mark for Loctite Corporation,
Permatex® is a registered trade-mark for Permatex Corporation.
7
Safety information
Safety rules for fluorocarbon
rubber
Fluorocarbon rubber is a common material in seal
rings for shafts, and in O-rings, for example.
When fluorocarbon rubber is subjected to high temperatures (above 300°C), hydrofluoric acid can be
formed, which is highly corrosive. Skin contact can
give severe chemical burns. Splashes in your eyes
can give severe chemical burns. If you breathe in the
fumes, your lungs can be permanently damaged.
WARNING! Be very careful when working on engines which have been exposed to high
temperatures, e.g. overheating during a seizure
or fire. Seals must never be cut with an oxyacetylene torch, or be burned up afterwards in
an uncontrolled manner.
8
l
Always use gloves made of chloroprene rubber
(gloves for handling chemicals) and protective
goggles.
l
Handle the removed seal in the same way as corrosive acid. All residue, including ash, can be
highly corrosive. Never use compressed air to
blow anything clean.
l
Put the remains in a plastic box which is sealed
and provided with a warning label. Wash the
gloves under running water before removing them.
The following seals are probably made from fluorocarbon rubber:
Seal rings for the crankshaft, camshaft, intermediate
shafts.
O-rings irrespective of where they are installed. Orings for cylinder liner sealing are almost always made
from fluorocarbon rubber.
Note that seals which have not been subjected to
high temperature can be handled normally.
Special tools
In all cases where it is practical, tools have had their part number punched on, but not the last figure. The last figure (after the dash) is a check sum figure.
884948
884949 9812546
9992655
9992658
9991084
9991459
9992661
9991801
9992669
9991867
9992677
9992000
9992679
9992071
9992178
9996087
9996169
9992479
9996394
9992497
9996395
9992497-9
Drift for removal/installing con rod bush,
7(x) series.
Plug brush for cleaning the seat and
base of the injector nozzle sleeve
9992655-2
Extractor for polygon hub on crankshaft
9992658-6
Extractor for crankshaft gear
9991084-5
Drift for removing valve guides, 7(x)
series.
9992661-0
Drift for removing valve guides, 7(x)
series.
9991459-6
Drift for removing valve guides, 6(x)
series.
9992669-3
Drift for removal/installing con rod bush,
6(x) series.
9991801-3
Standard shaft, 18x200 mm
9992677-6
9991867-4
Drift for removing and installing rocker
arm bushes, 6(x) series.
Drift for removal/installing rocker bush,
7(x) series.
9992679-2
Extractor for timing gear wheels
9992000-1
Standard shaft, 25x200 mm
9996087-4
9992071-2
Drift for removal/installing gudgeon pins.
Also used to remove the coolant pump
Extractor plate for lining extractor, 6(x)
series.
9996169-0
Extractor plate for lining extractor, 7(x)
series.
Mandrel for valve guide installation, 6(x)
series.
9996394-4
Support leg (2 no.) for 9996645
9996395-1
Counterhold (2 no.) for 9996645
884948-1
Tool for installing crankshaft gear
884949-9
Installation tool for polygon hub
9812546-1
9992178-5
9992479-7
Holder for dial gauge, for checking lining
height above block plane
9
Special tools
9996421
9996400
9996402
9996650
9996651
9996419
9996433
9996437
9996643
9996420
9996657
9996841
9996662
9996645
9996842
9996847
9996400-9
Impact hammer. Used with 9996419 or
9996657.
9996651-7
End cutter for cleaning the bed for the
copper cylinder (stage 2)
9996402-5
Mandrel for installing copper sleeves
9996657-4
Extractor for copper cylinder
9996419-9
Extractor for the steel ring above the
copper sleeve
9996662-4
Pressure test equipment
9996772-1
9996420-7
Mandrel for installing copper sleeves and
steel rings, 7(x) series.
Tool for checking camshaft wear. Used
with 9989876
9996841-4
9996421-5
Mandrel for installing copper sleeves and
steel rings, 6(x) series.
Cutting tool for opening up sealant
grooves in cylinder head, 6(x) series*
9996842-2
9996433-0
Adapter (lid). Used with 6662
Cutting tool for opening up sealant
grooves in cylinder head, 7(x) series*
9996437-1
Tool for installing the rear crankcase seal
9996847-1
9996643-4
Injector extractor
Press tool (2 required). Used for measuring lining collar height above block plane
9996645-9
Cylinder liner extractor. Used with
9996394 and 9992178 or 9996087
* 9999745
Repair kit containing a cutter for cutting tools
9996841 and 9996847.
9996650-9
End cutter for cleaning the bed for the
copper cylinder (stage 1)
10
Special tools
9998114
9996852
9996855
9996861
9996867
9998009
9998070
9998079
9999508
9999553
9996878
9996852-1
Connection washer for pressure testing
the cylinder block
9996855-4
Mandrel for installing the front crankshaft
seal
9998115
9998070-8
Tool for installing the copper sleeve and
steel ring, 6(x) series. Used together with
9996406 and 9996421
9998079-9
Tool for lifting camshaft in and out
9998114-4
Seal plate (2 required) for pressure testing the cylinder block, 6(x) series
9996861-2
Tool for installing the copper sleeve and
steel ring, 7(x) series. Used together with
9996402 and 9996420
9998115-1
9996867-9
Underlay for extracting the copper sleeve
and steel ring. Used together with
9996419 and 9996657
Seal plate (2 required) for pressure testing the cylinder block, 7(x) series
9999508-6
Cutter for renovating liner seat, 7(x)
series1)
9996878-6
Jig for cylinder block
9999553-2
As above, but for 6(x) series2)
9998009-6
Adapter for measuring compression pressure
1)
Cutter for cutting tool 9999508
Cutter for cutting tool 9999553
2)
9999518
9999554
11
Other special equipment
885126
9988539
9989876
Other special equipment
885126-3
Piston ring compressor
9988539-4
Compression gauge
9989876-9
Dial gauge 0–20 mm
9999696-9
Magnetic stand
12
9999696
Design and function
Engine, general
The engines are straight 6-cylinder, 4-stroke diesel engines with overhead valves. They have direct fuel injection and turbocharging.
Since the induction air is cooled, the combustion and
exhaust temperatures are kept at a suitable level, despite the higher power output.
The engines have wet, replaceable cylinder liners and
two separate cylinder blocks, each of which contains
three cylinders. The cylinder blocks are mutually interchangeable.
Intercooling also gives lower exhaust emissions,
since combustion becomes more complete thanks to
the greater oxygen content of the induction air.
Engine lubrication is by means of a pressure lubrication system containing an efficient oil pump which
pumps out oil to two galleries in the cylinder block.
Oil is pumped out via the lubrication filter to the lubrication points in the engine and via a piston cooling
valve to the oil cooler and pistons.
The piston cooling valve opens when the oil pressure
has reached a certain level, and oil is squirted into a
duct underneath the piston crown. The jet of oil is then
led via a cooling loop in the upper part of the piston.
In the oil cooler, the heat is transferred from the oil to
the cooling system of the engine.
The oil is cleaned by means of a full flow oil filter.
The cooling system is divided up into a fresh water
system and a sea water system.
The fresh water system is thermostatically controlled
and cools the cylinder block and cylinder head.
The sea water cools the fresh water via a heat exchanger.
Some engines can be equipped with a 1-circuit or
2-circuit hull cooling system as follows:
TAMD63
1-circuit system
TAMD71
1-circuit or 2-circuit system
TAMD72
2-circuit system
The engine version with hull cooling does not have a
heat exchanger.
The turbo compressor supplies fresh air under pressure to the engine, which gives a large surplus of air.
This allows the amount of fuel injected to be increased, and this gives increased engine power.
The engines are provided with sea water cooled aftercoolers, which lowers the temperature of the induction
air after turbocharging. This reduces the volume of the
air and more air (oxygen) can be supplied to the engine. The additional air allows a further increase in the
amount of fuel injected, which increases engine power.
The turbine housing of the turbocharger is fresh
water cooled, the rest of the turbocharger is cooled by
the engine oil.
TAMD63-P and TAMD72 have turbochargers with
wastegates for greater low speed power. All engines
apart from TAMD63-P and TAMD72P-A, WJ-A have
an electric starting heater to facilitate starting and reduce exhaust smoke during starting in cold weather.
In order to further reduce exhaust emissions, the
TAMD61, TAMD62 and TAMD71 engines have a bypass valve for induction air. At low loading, the passage through the aftercooler is shut off and the air
which has been heated by the turbocompressor is led
directly (through the starting heater) into the induction
manifold.
On the TAMD63 and TAMD72, which have higher
compression ratios, other combustion chambers and
modified injection systems, this equipment is not
needed
The TAMD72P-A(EDC) is equipped with EDC (Electronic Diesel Control), a system which electronically
controls the regulator in the engine’s injection pump.
This system offers a reduction in exhaust emissions.
In the EDC system, the centrifugal regulator in the injection pump is replaced by an electromagnetic actuator.
The actuator in the regulator is operated by a control
unit which obtains information from a number of sensors located on the engine and controls. The control
unit then calculates the amount of fuel to be injected
for every loading case, on the basis of this information.
Note. On the TAMD72P-A, the EDC system controls
the starting sequence so as to reduce the exhaust
emissions to an even lower level. In order to increase
the combustion temperature before starting, the
start motor cranks the engine 4 turns before fuel is injected.
13
Design and function
Design differences, engine
versions
This workshop manual applies to all engines of the
6(x) series; TAMD61A, TAMD62A, TAMD63L-A
and TAMD63P-A, and from the 7(x) series;
TAMD71A, TAMD71B, TAMD72A, TAMD72P-A
and TAMD72WJ-A.
l
New sea water pump
l
Stop function with solenoid valve
l
New electrical system with sealed connectors
and cables run in flexible hoses. Junction boxes,
monitors and sensors have rubber mountings (vibration reducing)
l
New alternator (engines with 24V electrical systems)
The most important differences are:
TAMD63P-A – TAMD63L-A
TAMD61A – TAMD62A
TAMD63L-A has:
TAMD62A has:
l
Lower power rating
l
Higher power
l
Injection pump with changed settings
l
Pistons with modified profiles
l
l
Injection pump with changed settings
New injector with changed opening pressure and
other hole design
l
Different oil change intervals
l
Turbocharger with wastegate valve
l
New external design
TAMD71A – TAMD71B
TAMD62A – TAMD63P-A
TAMD63P-A has:
l
Completely new marinisation, installation volume
reduced by about 30%
l
Higher power
l
Low rotation cylinder head with new valve seats
for both inlet and exhaust valves.
l
Increased valve clearance (inlet and exhaust)
l
Pistons with modified combustion chambers
l
New piston rings
l
Higher compression
l
Injection pump with RQV regulator and changed
settings
l
Reinforced pump coupling
l
5-hole injector nozzles with higher opening pressure
l
TAMD71B has:
l
Higher power
l
New cylinder liners, pistons and piston rings. The
upper piston ring is of the “Keystone” type.
l
Injection pump with changed settings
l
Injectors with higher opening pressure
l
New stop solenoid
TAMD71B – TAMD72A
TAMD72A has:
l
Higher power
l
Modified cylinder heads with new valve seats
(inlet and exhaust valves).
l
Changed valve clearance (inlet and exhaust)
l
New upper piston rings (higher) of the “Keystone” type.
Reinforced (preloaded) supply pipes
l
l
New pistons with higher compression ratio and
suited to the new piston rings.
Turbine optimised for high torque, integrated
wastegate
l
Larger oil cooler
l
Washable air filter
l
Different oil change intervals
l
Lubrication system with “by-pass” oil filter
l
l
New injection pump with higher injection pressure
and changed settings.
New oil filter bracket with horizontally located oil
filter
l
Reinforced pump coupling
l
Larger oil cooler (same as on TAMD72)
l
New centrifugal regulator
l
New galvanized sheet metal sump (rubber insulated from cylinder block for lower engine noise)
l
New injectors with changed injection pressure
l
Reinforced supply pipes
l
New turbocharger with separate wastegate
l
Electric starting heater and by-pass valve are
extra equipment (not normally needed because of
the higher compression)
l
New external styling
l
New heat exchanger with integrated expansion
tank
l
New aftercooler. Modified water flow, incoming
water passes aftercooler before heat exchanger
l
New belt driven coolant pump
14
Design and function
TAMD72A – TAMD72WJ-A
l
TAMD72WJ-A is a TAMD72A which has been modified for use with a water jet unit. TAMD72WJ-A has:
Electronic box (EDC) added, located beside the
rear fuel filter
l
Stop solenoid deleted (the engine is stopped by
the EDC system)
l
New injection pump with changed settings.
l
Different turbo without wastegate
l
New turbocharger with integrated wastegate valve
l
Oil pipes to suit the new turbo
l
l
New induction manifold
New rubber mounted junction box located by exhaust pipe
l
Higher power
l
Sensor and monitor for engine oil pressure separately installed and rubber mounted
l
Reinforced insulation on engine cables (convoluted PA66 plastic hose) with moisture-proof connectors
l
New alternator with zener diodes, 24V/60A or
12V/60A.
TAMD72A – TAMD72P-A(EDC)
l
New injection pump with electronic regulator. The
regulator contains an actuator which acts on the
injector pump control rod and thus affects
the injected fuel quantity (power output)
Location of type approval
plates
1.
2.
3.
4.
5.
6.
7.
8.
Engine designation
Engine serial number
Engine product number
Reverse gear designation
Reverse gear serial number
Reverse gear product number
Engine designation and product number
Serial number/short block number
15
Design and function
Engine presentation
TAMD61A
1
2
5
4
3
6
7
8
14 13
1
2
3
4
5
6
7
12
11
10
Junction box with circuit breakers
Coolant filler cap
Fuel filter
Oil filler cap (also at front edge of engine)
Injection pump
Stop solenoid
Turbocharger
1 2
9
8
9
10
11
12
13
14
3
Oil cooler, reverse gear
Reverse gear, MPM IRM 220A
Dipstick (alternative location)
Oil cooler, engine
Smoke limiter
Circulation pump
Alternator
4
5
6
7
9
13
1
2
3
4
5
6
7
16
12
2
Turbocharger
Air filter
Relay for electric starting heater
By-pass valve (directs air flow through aftercooler)
Expansion tank
Coolant filler cap
Lubrication oil filter
11
8
9
10
11
12
13
8
10
Sea water pump
Heat exchanger
Aftercooler
Start motor
Dipstick, reverse gear, MPM IRM 220A
Oil filler cap, reverse gear
Design and function
TAMD62A
2
3
4
5
6
1
7
14
1
2
3
4
5
6
7
13
12
Air filter
By-pass valve (directs air flow through aftercooler)
Filter for crankcase breather
Aftercooler
Heat exchanger
Expansion tank
Sea water pump
11
10
9
8
8 Lubrication oil filter (alt. location at left-hand rear
of engine as extra equipment)
9 Flexible engine mountings (extra equipment)
10 Sump
11 Dipstick
12 Start motor
13 Reverse gear, MPM IRM 220A-1
14 Dipstick, reverse gear
17
Design and function
TAMD63L-A, TAMD63P-A
1 2
14
1
2
3
4
5
6
7
8
14
18
13
5
Filter for crankcase breather
Air filter
Aftercooler
Relay for electric starting heater
Oil filler cap
Expansion tank
Coolant filler cap
Heat exchanger
2 3
6
12 11
Fuel filter, fine
Smoke limiter
Coolant filler cap
Injection pump
Oil filler cap
Junction box with circuit breakers
Turbocharger
Water cooled exhaust riser (extra equipment)
1
1
2
3
3
4
5
6
7
3 4
7 8
10
9
9
10
11
12
Reverse gear, MPM IRM 220A-1
TAMD63P-A: Wastegate valve (by-pass valve)
Dipstick, engine
Solenoid valve (fuel shut-off valve) for engine
stopping
13 Oil cooler, engine
14 Flexible engine mounting (extra equipment)
5
4
13 12
8
9
10
11
12
13
14
6
11 10
7
8
9
Alternator
Sea water pump
By-pass filter for lubrication oil
Lubrication oil filter, engine
Start motor
Dipstick, engine
Dipstick, reverse gear
Design and function
TAMD71A
1
2
3
4
5
6
7
8
12
10
11
1
2
3
4
5
6
9
Junction box with circuit breakers
Coolant filler cap
Fuel filter
Oil filler cap (also at front edge of engine)
Injection pump
Stop solenoid
7
8
9
10
11
12
1 2 3
Turbocharger
Oil cooler, reverse gear
Reverse gear, TD MG507
Oil cooler, engine
Smoke limiter
Circulation pump
4
5
9
14
1
2
3
4
5
6
7
8
13
2
12
Turbocharger
Air filter
Relay for electric starting heater
By-pass valve (directs air flow through aftercooler)
Expansion tank
Coolant filler cap
Lubrication oil filter
Sea water pump
6
8
7
11 10
9
10
11
12
13
14
Heat exchanger
Dipstick
Aftercooler
Start motor
Dipstick, reverse gear, TD MG507
Oil pump
19
Design and function
TAMD71B
1
2
3
4
5
6
7
14
8
13
12
1
2
3
4
5
6
7
20
Junction box with circuit breakers
Coolant filler cap
Fuel filter
Oil filler cap
Injection pump
Stop solenoid
Turbocharger
11
10
8
9
10
11
12
13
14
9
Oil cooler, reverse gear
Reverse gear, TD MG507A
Dipstick (alternative location)
Oil cooler, engine
Smoke limiter
Circulation pump
Alternator
Design and function
TAMD72A
1
2
3
16 15
1
2
3
4
5
6
7
8
4
14
5
6
13
12
9
10
11
12
13
14
15
16
Junction box with circuit breakers
Coolant filler cap
Fuel filter
Oil filler cap
Injection pump
Stop solenoid
Wastegate valve (by-pass valve)
Turbocharger
2
7
8 9
11 10
Water cooled exhaust riser (extra equipment)
Reverse gear, TD MG5061SC
Oil cooler, reverse gear
Dipstick (alternative location)
Oil cooler, engine
Smoke limiter
Circulation pump
Alternator
3
4
5
1
6
11
1
2
3
4
5
6
Air filter
Filter for crankcase breather
Aftercooler
Heat exchanger
Expansion tank
Sea water pump
10
9
8
7
7 Lubrication oil filter (alt. location at left-hand rear
of engine as extra equipment)
8 Sump
9 Dipstick
10 Start motor
11 Dipstick, reverse gear, TD MG507A-1
21
Design and function
TAMD72WJ-A
1
13
1
2
3
4
5
6
7
22
2
12
Junction box with circuit breakers
Coolant filler cap
Fuel filter, fine
Smoke limiter
Injection pump
Oil filler cap
Turbocharger
3
4
5
11
6
10
8
9
10
11
12
13
7
8
9
Water cooled exhaust riser (extra equipment)
Stop solenoid
Alt. dipstick location
Oil cooler, engine
Circulation pump
Alternator
Design and function
TAMD72P-A (EDC)
1 2
3
15 14
1
2
3
4
5
6
7
8
5
13
2
11
Air filter
Filter for crankcase breather
Aftercooler
Heat exchanger
Expansion tank
Sea water pump
6
11 10
9
10
11
12
13
14
15
4
9
9
Reverse gear, TD MG507-1
Oil cooler, reverse gear
Wastegate valve (by-pass valve)
Alt. dipstick location
Oil cooler, engine
Circulation pump
Alternator
3
10
7 8
12
Coolant filler cap
Fuel filter, fine
Control unit (EDC)
Oil filler cap
Injection pump
Junction box with circuit breakers
Turbocharger
Water cooled exhaust riser (extra equipment)
1
1
2
3
4
5
6
4
8
5
7
6
7 Lubrication oil filter, engine (alt. location at lefthand rear of engine as extra equipment)
8 Sump
9 Dipstick
10 Start motor
11 Dipstick, reverse gear, TD MG507-1
23
Design and function
Component description
Cylinder heads
1
4
The engine has two (identical) cylinder heads, each of
which covers three cylinders. The cylinder heads are
screwed to the cylinder block by 20 screws per head
(M11).
The cylinder head material is a special cast iron alloy.
The cylinder head gasket is solid sheet steel.
The cylinder head plane has lands, formed by two
concentric wide grooves, recessed in the plane of the
cylinder head, centred on the cylinder liner collars.
These grooves determine the size of the sealing surface so that the requisite sealing pressure is obtained
without the tightening torque needing to be so high
that there is a risk of deformation of the liner shelf in
the cylinder block. In addition, there is a groove for
the “flame edge” of the cylinder liner.
The fastening screws for the cylinder head are tightened by means of a combination of torque and angle
tightening.
2
3
Cylinder head sealing
1
2
Cylinder head
Cylinder block
3
4
Cylinder liner
Cylinder head gasket
Valve mechanism
The valves are made from chrome nickel steel, the
valve stems are chrome plated. The exhaust valves
for TAMD71/72 and the inlet valves for TAMD63 (from
Autumn 1995) have valve heads made from Nimonic
80. The exhaust valves on other engines of the 6(x)
series have Stellite coated sealing surfaces. The
valves are operated by rockers on a rocker bridge.
The engine has two rocker bridges, one for each cylinder head. The rockers are operated by the camshaft,
via push rods and valve lifters.
Depending on the design of the cylinder head (valve
seat location), there are two different valve heights on
the 6(x) series. The illustration and table show the difference between the location of the valves (valve
height above cylinder head plane).
The valve seats made from special steel are interchangeable. Valve seats with standard dimensions
and overdimensions are available as spare parts. The
overdimension seat has a 0.2 mm greater overall diameter and is used if the cylinder head needs the
valve seat locations to be milled out.
A
B
TAMD62
0.7–1.1
0.7–1.1
TAMD63
0.0–0.4
0.0–0.4
Valve location
A = Inlet
B = Exhaust
24
Design and function
Cylinder block
The cylinder block is cast in one piece and is made of
special cast iron alloy. The tension forces in the cylinder head screws, caused by combustion pressures,
are transmitted by stiffened sections in the interior
walls of the cylinder block to the main bearings.
The camshaft bearings are broached to the correct dimension after assembly.
Cylinder block
Cylinder liners
The cylinder liners are of the wet type and are replaceable. They are made from centrifugal cast iron. The
cylinder liners have a so-called “Flame edge”, please
refer to pos. 4. The flame edge, which fits a groove in
the cylinder head, reduces the stress on the cylinder
head gasket.
Four rubber O-rings are used to seal the cylinder
liner. The three lower rings are located in turned
grooves in the cylinder block. These rings are made of
different materials. The lowest seal ring (violet) is
made from fluorocarbon rubber (FPM), whereas the
two upper rings in the lower liner seal are identical and
are made of ethylene-propylene rubber (EPDM).
Note. There have been two previous versions of the
seal kit. In the first version, the two lower seal rings
were identical and were made of fluorocarbon rubber
(black with a green or yellow spot), whereas the upper
seal ring in the lower cylinder liner was made of ethylene-propylene rubber (EPDM), and was marked with
two white paint spots. In another design, all the lower
seal rings were identical and were made of fluorocarbon rubber (marked with a green or yellow spot).
Cylinder liner
1
2
Cylinder head
Cylinder block
3
4
Cylinder liner
Flame edge
WARNING! Special safety rules apply to fluorocarbon rubber which has been exposed to high
temperature. Please refer to page 8.
25
Design and function
Pistons
The pistons are made of light metal alloy. The top
compression ring, which transmits the majority of the
heat which is transferred via the pistons, is located in
a ring carrier made of high alloy special cast iron,
which is cast in to the piston. This gives the piston
ring groove long service life despite the heat loading.
The piston ring grooves for the other pistons are machined directly into the piston.
The pistons also have a circular space inside the upper part of the piston, through which the oil for piston
cooling passes. On the pistons for the 6(x) series,
there is an expansion area in the gudgeon pin hole
(“side relief”), which reduces the stresses on the piston during the combustion process. The same advantages are achieved on the 71 and 72 engines by
means of a trapezoid con rod end.
The combustion chamber is entirely contained within
the piston crown.
Pistons and cylinder liners are only stocked as complete sets for spare part purposes.
Piston design
Piston rings
6(x) series
Each piston has two compression rings and one oil
scraper ring.
A
B
C
Combustion chamber diameter*
Combustion chamber depth*
Ring carrier
Piston ring profiles
On the TAMD61, TAMD62 and TAMD63, the top compression ring is of the “Keystone” type (trapezoid)
The ring has a molybdenum coating and must be installed with the TOP marking upwards.
The second compression ring (chrome plated), which
is slightly conical and has a turned internal chamfer,
must be installed with the TOP marking upwards.
The oil scraper ring (chrome plated) may be installed
either way up.
The ring has two scraper edges which are pressed
against the cylinder wall, both by the spring force of
the ring itself and by an expansion spring located inside the scraper ring. The opening in the expansion
springs should be located diametrically opposite to the
gap in the oil rings*.
* TAMD63: The white paint spot on the spring should be visible
through the outer ring gap.
Gudgeon pin hole with “side relief”
26
TAMD 61, TAMD62
TAMD 63
Design and function
TAMD71
Each piston has three compression rings (early version), or two compression rings (later version)* and
one oil scraper ring.
The upper compression ring on the early version is
chrome plated and has a turned internal chamfer, and
on the later version it is molybdenum coated and must
be fitted with the TOP marking** uppermost. The
TAMD71B has a top ring of the “Keystone” type.
The second ring, and on the early versions, the third
ring as well, are slightly conical and have to be installed with the TOP marking** upwards. On the early
versions, the rings are coated with Ferrox. (Ferrox attracts oil and thus has a lubricating effect.)
TAMD 71 Early version
TAMD 71 Later version
The second compression ring also has three Ferrox
filled grooves, and the third compression ring has a
turned internal chamfer.
On the later version, the second compression ring is
chromed and has an internal chamfer, the third compression ring has been abolished.
The oil scraper ring is of the same type as on the 6(x)
series.
*
TAMD 71B
TAMD 72
Piston ring profiles
The pistons on the later version still have 4 piston ring
grooves, but the third groove is empty.
** TOP, TOPCX TOPCF or a machined mark (-).
TAMD72
Each piston has two compression rings and an oil
scraper ring. The upper compression ring is of the
“Keystone” type and is unique to the 72 series (different height), and is installed with the “TOPCD” marking
upwards.
The other rings are similar to the TAMD71B.
27
Design and function
Timing gear
The timing gear consists of cylindrical gear wheels
with spiral cut teeth.
The injection pump and camshaft are driven from the
crankshaft gear via an idler gear. The engine oil pump
is also driven from the crankshaft gear via an idler
gear.
In addition to the camshaft, the camshaft gear also
drives the gear for the sea water pump (the sea water
pump on the TAMD63 is driven by a Poly-Vee belt).
If a servo pump is fitted (extra equipment), this is also
driven from the camshaft gear.
Three different surface treatments have been used on
the gear wheels; case hardening, hardening & tempering and nitrocarburising. Please refer to the instructions about nitrocarburised gears on page 61 before
replacing any gear wheels.
Timing gear
1
2
3
4
5
6
7
8
Sea water pump drive
Camshaft gear
Idler
Injection pump drive
Coolant pump drive
Crankshaft drive
Idler for oil pump
Oil pump drive
Crankshaft
The crankshaft is supported on seven main bearings.
The thrust bearings consist of thrust washers on the
centre main bearing. The crankshaft is statically and
dynamically balanced. At the front, the crankshaft has
a so-called polygon profile, and the rear there is a
flange to which the flywheel is screwed.
The crankshaft is nitrocarburised. On condition that
the shaft does not need to be re-aligned, it can be
ground down to the 2nd underdimension before it
needs to be nitrocarburised again.
Crankshaft with con rods and pistons
Big and small end bearings
The big and small end bearings consist of indium plated, lead bronze lined steel shells. The bearings are
precision made and are entirely ready for installation.
Five under-dimensions can be obtained as spare
parts. The thrust washers for axial location of the
crankshaft are available in three overdimensions.
28
Design and function
Con rods
The con rods have an I section, and are drilled for
pressure lubrication of the gudgeon pins. Since the
con rods have obliquely split big ends, they can be
pulled up through the cylinder bores during engine renovation.
The gudgeon pin bushes are made of steel and have a
bronze alloy lining.
On the 71 and 72 series, the con rods have trapezoid
small ends, to give a larger effective bearing area
against the gudgeon pin.
Con rods with trapezoid small end (71 and 72 series).
Camshaft
The camshaft is drop forged and induction hardened,
the cams are profile ground. The camshaft runs in
seven bearings. End float is determined by the camshaft gear wheel, the shoulder on the foremost camshaft bearing journal and the thrust washer screwed to
the front surface of the cylinder block.
Flywheel
The flywheel is screwed to a flange on the rear of the
crankshaft. It is statically balanced and fully machined. The flywheel ring gear is shrunk onto the flywheel.
Torsional damper
The torsional damper consists of a hermetically
sealed housing containing a steel flywheel bob of rectangular section. The flywheel bob (damping ring) rotates on a central bushing and is surrounded on all
sides by a viscous fluid (silicone compound).
Torsional damper
1
2
3
4
5
Crankshaft
Hub
Fluid space
Bushing
Flywheel bob
6
7
8
9
Housing
Lid
Timing gear housing
Seal ring
29
Repair instructions
General
Before every major service task, a condition test
should be carried out if possible, to determine the general condition of the engine and to find any cooperating fault causes. It is necessary to operate
the engine during a condition test, so this should be
done before the engine or any engine components are
removed.
Please refer to condition test, engine, on page 32.
Measures before renovation outside the
boat
4 Lift the boat up onto land
5 Turn off the battery isolator, remove the battery
connections from the start motor.
6 Remove the connector between the engine
cables – instrument panel
7 Remove the sea water connections/hull cooler
connections.
8 Remove the exhaust pipe
9 Shut off the fuel cocks. Remove the fuel pipes.
10 Remove the throttle and gear shift cables
Measures before renovation in the boat
11 Undo the propeller shaft from the reverse gear.
Undo the engine pads from the bed and lift the
engine out.
1 Turn off the battery isolator
2 Clean the outside of the engine
NOTE! Make sure that washing residue is taken
care of for destruction, and is not inadvertently
dumped into the environment.
Please refer to the warning text in item 11 as
well.
3 Work on the cooling system: Shut off the sea
cocks and drain the coolant from the sea water
and fresh water systems.
WARNING! Make sure that all sea cocks
are securely shut and that water can not get
in when you disassemble any components
in the cooling system.
30
Measures after lifting out the engine
12 Clean the engine
WARNING! When you are clean the engine
with a high pressure washer. Be very careful
when cleaning, to avoid water entry into the
engine. When the high pressure function is
engaged, the water jet must never be aimed
at seals, e.g. shaft seals, joints with gaskets, rubber hoses or electrical components.
13 Drain the engine oil off.
14 Remove the reverse gear (if necessary).
Repair instructions
Engine stand attachment
Jig no. 9996787 is used to attach the engine to the
engine stand. The jig is screwed to the right-hand side
of the engine, as in the illustration below.
Before the engine jig can be fitted, and the engine attached to the engine stand, the following components
must be removed from the engine:
NOTE! It is important that the note about the numbers
and dimensions of screws is observed, for safe attachment of the engine.
TAMD61/62
Screws required:
Heat exchanger, aftercooler, start motor, oil filter
bracket, front engine mounting and rear hatch for
valve lifter.
6(x) series
7(x) series
3 no. M8x30 mm
M8x30 mm
TAMD63
2 no. M10x30 mm
M10x30 mm
Heat exchanger, aftercooler, start motor, oil filter
bracket, front engine mounting, rear hatch for valve
lifter, air filter and expansion tank
2 no. M12x40 mm
TAMD71/72
Heat exchanger, aftercooler, start motor, oil filter
bracket, rear hatch for valve lifter and oil filter housing.
1
2
3
M8x30 mm
4
M10x30 mm [6(x) series] 5
M8x30 mm
M10x30 mm [6(x) series]
M12x40
31
Repair instructions
Condition test, engine
Cylinder head, renovation
Compression test
Cylinder head, removal
Special tool 9998009
Special tool nos. 9996643, 9996847*
A compression test is done in order to assess the
condition of the engine in a simple and reliable manner, this indicates the sealing ability of the piston
rings and valves.
TAMD61/62/63, TAMD 71/72
l
Warm the engine up and stop it.
l
Remove all the injectors and test each of the cylinders in turn.
WARNING! Observe the greatest possible
cleanliness, to avoid getting dirt into the fuel
system. Plug the connections where injectors
and fuel pipes have been disconnected.
1
Remove both battery cables
2
Close the sea cocks and drain the water in the fresh
water and sea water systems.
If the engine has a hull cooling system, close the
valves for this system and drain the engine.
Applies to TAMD61/62, TAMD 71/72
The compression pressure should be read off att normal start motor speed. A deviation of 10% below the
data given on page 6 in the “Technical data” manual
can be approved.
3
Low compression pressure in all cylinders indicates
worn cylinder liners and piston rings. If you find one
cylinder whose values lie below the others, this could
be caused by either poorly sealing valves, broken cylinder rings or a cylinder head gasket which does not
seal properly.
4
Remove the shield over the heat exchanger and aftercooler. Remove the filter.
Remove the pipe between the sea water pump and the
heat exchanger, and between the aftercooler and reverse gear oil cooler.
5
Remove the lid on the heat exchanger (rear heat exchanger on the TAMD71 and TAMD72). Remove the
connecting pipe to the aftercooler (or to the front heat
exchanger on the TAMD71 and TAMD72).
Release the breather pipe (plastic) from the expansion
tank.
6
Remove the coolant pipes between the heat exchanger and the coolant pump, and between the heat exchanger and thermostat housing.
Remove the heat exchanger.
7
Remove the connection pipe between the aftercooler
and the induction manifold and between the aftercooler and the by-pass valve.
Remove the aftercooler.
Insert adaptor no. 9998009 into the injector hole and
attach it with the fastening brace and nut for the injector.
Fit a compression gauge to the adaptor and do the
compression test.
32
8
Remove the connection pipe between the starting
heater and the induction manifold. Hang up the bracket with the starting element relay.
Repair instructions
9
19
Free the plastic pipe for the smoke limiter from the
front edge of the induction manifold. Remove the induction manifold.
If the engine has a stop solenoid, remove it and hang
it up.
Applies to all engines
Applies to TAMD63
20
10
Shut off the fuel taps. Remove the fuel pipe leading to
the fine filter, the supply pipes and the fuel leakage
pipes. Remove the fuel filters.
Undo the alternator bracket and lift the generator away
with its bracket, plus the oil pressure sensor and oil
pressure monitor with bracket.
Install protective covers.
21
11
Remove the clamps for the cable harness at the
lower edge of the heat exchanger and the intercooler.
Remove the coolant pipe between the oil cooler and
the thermostat housing lid.
Undo the flange for the coolant pipe by the front edge
of the exhaust manifold.
Undo the electrical connections to the temperature
sensor.
12
Remove the cooling water hoses to and from the heat
exchanger and the aftercooler.
22
13
23
Remove the thermostat housing and the connection
pipe.
Remove the vent pipe at the front of the heat exchanger and the pressure hose for the smoke limiter.
14
Remove the screw behind the heat exchanger.
15
Remove the 5 remaining screws which hold the heat
exchanger and lift it away from the engine.
Remove the injectors*
16
Remove the air filter housing, the air supply pipe and
the hose between the turbocharger and the aftercooler.
17
Remove all screws holding the induction manifold.
Remove the yoke and turn the injector forwards and
backwards with a spanner (PU-15), at the same time
as you pull it out. If the injector has stuck, use extractor no. 6643. This avoids the risk of pulling the
copper sleeve out at the same time.
* If you are very careful to avoid damaging the injector nozzle
tips, the cylinder head can be removed with the injectors in
place.
18
Undo both the screws behind the aftercooler a few
turns and lift the aftercooler off.
33
Repair instructions
24
Free the exhaust pipe from the turbocharger.
Remove the coolant pipe between the turbo and the
cylinder block.
Cylinder head disassembly/
assembly
Special tool: 885128
Remove the oil pipes for the turbocharger. Install protective covers.
25
Remove the turbocharger and exhaust manifold. Cover the turbo inlet and outlet with clean paper or use
some other method, to prevent dirt and other
foreign matter from entering the turbocharger.
26
Remove the valve covers. Undo the rocker bearing
screws, remove the rocker mechanism and pushrods.
NOTE! Mark the push rods or put them in a stand, in
the correct order.
27
Remove the cylinder head screws and lift the cylinder
head off. Remove the cylinder head gaskets, rubber
seals and their guides from the cylinder block.
28
Cylinder heads in the 6(x) and 7(x) series have twin
valve springs (an inner and an outer spring).
Clean the cylinder head and cylinder block mating faces.
29
Disassembly
Install two press tools 9996487 to retain the cylinder
liners1).
The cylinder head core plugs should not be removed
unless damage makes this necessary. The valves
and valve springs must be re-installed in their original
locations if they are to be re-used. Use marked stands
or small component boxes to ensure correct location.
1)
Necessary if work is going to be done where the crankshaft is
turned with the cylinder head detached. The cylinder liners then
have to be retained by 1 press tool no. 9996487 per cylinder
liner.
1
Remove the valve springs and valve by means of a
valve spring compressor. Remove oil seals, collets,
collars and valves.
The oil seals (protective ring above the collets) should
always be scrapped and replaced by new ones.
34
Repair instructions
2
1
Clean all components, be especially careful with the
oil and coolant galleries.
Remove any remaining soot and contamination from
the cylinder head mating surfaces. Clean the sealing
grooves with a suitable scraper (shaped to conform
with the contours of the grooves).
NOTE! Never pass a rotating steel brush or other tool
across the sealing grooves. The lands would then be
broken down and ruined.
Assembly
Connect the proof testing equipment to the compressed air mains and set the pressure gauge to
100 kPa (1 kp/cm2), using the reduction valve.
3
Clean the core plugs if they have been removed.
Clean the core plug seats.
Use Permatex® No. 3 or Volvo Penta 1161099-5 sealant.
Install the plug by means of a mandrel or sleeve.
4
Oil the valve stems and install the valves in their
guides.
NOTE! Observe the markings, to ensure that the
valves go back to their original locations.
NOTE! The reduction valve knob can be locked with a
lock ring which is moved along the spindle.
2
Then close the shut-off tap. During 2 minutes, the
pressure on the pressure gauge must not fall, for the
proof testing equipment to be regarded as being reliable.
3
5
Install the valve spring(s) and valve collar, and press
the spring(s) together with the valve spring compressor. Install the collets and a new valve stem seal.
Cylinder head, leakage check
Special tools: 9996662, 9996852
6(x) series 9998114 (2 no.), 7(x) series 9998115
(2 no.)
WARNING! Before using proof testing
equipment no. 9996662, it must be checked. Always observe the applicable safety
instructions.
Attach air connection plate 9996852, using two M10
screws and seal plates 9998114 (6x series) or
9998115 (7x series), using twelve M10x120 mm
screws and nuts.
35
Repair instructions
4
7
Check that the knob on the reduction valve of the
proof testing equipment is screwed out.
Screw in the reduction valve knob to give a pressure
of 50 kPa (0.5 kp/cm2) on the pressure gauge. Maintain this pressure for 1 min.
5
Connect the hose from the proof testing equipment to
the air connection plate.
8
Then raise the pressure to 150 kPa (1.5 kp/cm2).
Lock the reduction valve knob with the lock ring and
shut the tap off.
6
Check after one or two minutes whether the pressure
has fallen and if any air bubbles come out of the water
bath.
If there is any air leakage from the copper sleeves for
the injectors, this should be attended to in accordance
with “Copper sleeves for injectors, replacement” and
“Cleaning seats for copper sleeves” on pages 46 to
48.
Lower the cylinder head into a bath of water at 70°C
and open the tap.
36
Repair instructions
Cylinder head, inspection
Warpage
The warpage of the cylinder head must not exceed
0.03 mm.
The check is made with a feeler gauge and steel
ruler, whose sides has been shaved to an accuracy
corresponding to DIN 874/Normal. If the cylinder head
is found to be warped more than the permitted value,
the cylinder head must be planed or replaced.
If leakage has been found, or if the cylinder head has
blow-by lines, measurement is unnecessary, since a
cylinder head in this condition will have to be planed
or replaced anyway.
NOTE! The cylinder head on the TAMD63 must not be
planed, it should always be replaced if damaged.
Check that the seal grooves which are centrally above
the cylinder liners are undamaged.
For sealing grooves, please refer to “Cylinder head,
milling the seal grooves” on pages 39–42.
Cracks
When renovating engines with a large number of operation hours, heat cracks may be found between the
valve seats and the injector hole when the cylinder
head is inspected.
The cylinder head does not need to be replaced because of heat cracks.
The crack starts by the copper sleeve for the injector
and grows towards the valve seat location. The reason for the crack can be that the attachment yoke is
too done up too tightly, i.e. the wrong torque has been
used. Cracks of this type have not been known to
cause gas or coolant leakage, since the crack has not
grown through the base of the cylinder head.
When leakage has been found, it has been found to
be caused by contamination or damage to the copper
sleeve seat.
Please refer to “Cleaning the seat for the copper
sleeve” on pages 49 and 50.
37
Repair instructions
Valve guides, inspection
Valve guides, replacement
Special tools: 9999876 and 9999696.
Special tools: 6(x) series: 9991459, 9996169,
7(x) series: 9991084, 9992661.
1
Put the cylinder head on a flat surface and put new
valves in the guides.
The valve spindles should rest on the flat surface. If
necessary, remove the injector fastening studs to get
good contact.
1
2
Press out the valve guides with mandrel 9991459 6(x)
series, or 9991084 7(x) series.
Place dial gauge 9989876, with magnetic stand
9999696, so that the tip of the dial gauge rests upon
the edge of the valve head. Move the valve sideways
in the direction of the inlet and exhaust ports.
Read the values on the dial gauge.
2
Oil the new valve guides and press them in with mandrel 9996169, 6(x) series, or 9992661 7(x) series. The
mandrel gives the guides the correct height (23 mm
and 22 mm respectively) above the spring plane of the
cylinder head.
Wear tolerances
Inlet valve, max. clearance ............... 0.33 mm
Exhaust valve, max. clearance ......... 0.38 mm
If these values are exceeded, change the valve
guides.
38
3
Broach the valve guides up if necessary.
Repair instructions
Cylinder head, planing
Special tools: 9992479, 998976.
The warpage on the cylinder head must not exceed
0.03 mm.
Cylinder head, milling the seal
groove
Special tools: 998976 and 9992479 + 9996841, 6(x)
series; 9996842, 7(x) series
If the warpage exceeds this value, or if blow-by lines
occur, the cylinder head must be planed or replaced.
Please refer to the “Technical Data” section of the
workshop manual for the minimum height of the cylinder head.
Surface finish after planing must not exceed 1.6 RA.
NOTE! The cylinder head on the TAMD63 must not
be planed, it should always be replaced by a new one.
After planing, new seal lands and flame edges must
be milled.
Milling tool 9996841, 9996842,
1
2
3
4
Nut
Turning handle
Guide plate
Attachment screw
5
6
7
Spindle
Cutting head
Bit holder
1
Permitted distance (A) between the cylinder head
plane and valve head:
6(x) series
7(x) series.
Inlet valve ................. 0.7 – 1.1 mm 2.0 – 2.4 mm*
Exhaust valve ........... 0.7 – 1.1 mm 1.0 – 1.4 mm*
* TAMD72A: 0 ± 0.2 mm
If the permitted distance (A) is not met after planing,
the valve seats must be milled out.
When new grooves are milled, the cylinder head must
be planed so as to completely remove the old
grooves.
The height of the cylinder head, plus the distance between the plane of the valve heads and the cylinder
head plan must not fall below the values given in the
specifications section.
The grooving tool is centred with the flame edge
groove bit, and not with the guide plate as on other
grooving tools.
This is the reason why the guide plate attachment
screws have wide clearance in the valve guides.
39
Repair instructions
2
Setting the cutters
Set up the cutter head in a vice, with the bits facing
upwards.
4
The grooving tool has five bits. Three of them (Marked
A-A*-B) are intended to work the flame edge groove.
These should be adjusted to 2.8 mm +0.1, –0.2 mm.
Attach the dial gauge (998976) in holder 9992479 and
put this on the ring-shaped land on the cutting tool.
Zero the dial gauge against the land.
3
5
The remaining bits (marked C-D) are intended to work
the sealing plane, and should be adjusted to ±0.02
mm.
Slide the holder and dial gauge sideways so that the
gauge tip rests on the highest point of one of the cutters, and read off the dial gauge.
Adjusting the bit
6
Sealing grooves in cylinder head.
Undo lock screw “A” with a 4 mm Allen key, and turn
adjustment screw “B” a few turns with a 5 mm Allen
key.
40
Repair instructions
7
12
Press down the bit holder and tighten the lock screw
enough to press against the holder.
Install the bit holders in the cutter head, in accordance
with the letters, and with the grooves aligned towards
the lock screws. Adjust the bit height as instructed.
8
Put the dial gauge tip on the highest point of the bit
and turn the adjustment screw upwards until the correct value of bit height is obtained.
Tighten the lock screw.
NOTE! Check that the upper edge of the bit holder is
on the same plane as the cutter head. If it is not, the
dial gauge has turned one rotation too many.
Milling the grooves
13
Set the cylinder head up in a vice.
9
WARNING! Use protective jaw pads to avoid
damaging any sealing surfaces.
Set all bits to the specified depth, as in items 2 and 3.
Make sure that the cylinder head plane is completely clean.
Changing the bit set *
14
10
Put the guide plate of the tool on the cylinder head,
but do not tighten the nuts for the attachment screws.
Unscrew the lock screw a few turns and turn the adjustment screw upwards so that the bit holder can be
removed from the cutter head.
15
11
The bit holders are marked with a letter (A, A*, B, C
or D), and the corresponding letter is punched on the
cutter head, where the bits are to be installed.
Carefully put the cutting head on the guide plate, using rotating movements, so that the tool is centred on
the flame edge groove.
NOTE! The two socket cap screws in the bit holder
must not be touched.
NOTE! Do not tighten the nuts for the attachment
screws too hard, this could pull the valve guides into
the cylinder head.
* 9999745, repair kit for cutting tool 9996481 and 9996482.
41
Repair instructions
16
Valve seat, replacement
Special tools: 9992479, 998976
1
Install the spring and nut. Tighten the nut loosely.
17
Turn the tool clockwise, using even movements, and
without pressing. The cutters are fed automatically.
Turn the tool until the cutter bits stop cutting.
The valve seat should be replaced when distance (A),
measured with a new valve, exceeds
Remove the nut and lift off the cutting head.
TAMD61/62
TAMD63
TAMD71/72
Inlet ..........
1.5 mm
1.0 mm
3.0 mm
Exhaust ....
1.5 mm
1.0 mm
2.0 mm
18
Clean the cylinder head carefully. Then check the
depth of the grooves by putting the cutting head back,
without the spring and nut, and turn it a few times under hand pressure. If the tool cuts, the grooves do not
have the correct depth.
2
This check must always be done since swarf can get
under the collar of the cutting head.
The burrs left by the edges of the grooves should be
left in place.
If these burrs are broken off, the edges could be damaged, which would impair the sealing properties of the
grooves.
NOTE! The first time the grooving tool is used, after
the bits have been adjusted, the finished groove must
be checked with a dial gauge.
During this check, any burrs on the edge of the
grooves must be carefully removed, so that the dial
gauge holder seats correctly against the cylinder
head.
The old valve seat should be removed by grinding two
notches in the seat, and then splitting it with a cold
chisel. As an alternative, an old valve can be tack
welded in several places, and the old seat can then be
driven out.
Grind down the head of the scrapped valve so it can
be pushed down below the edge of the seat.
Weld with a MIG/MAG welder, cover the area round
the weld to avoid getting weld spatter stuck anywhere.
WARNING! Be careful not to do any damage to
the cylinder head.
42
Repair instructions
3
Clean the valve seat location carefully, and check that
there are no cracks. Measure the diameter of the
valve seat location. Use the measurement to determine whether a STD or OD dimension seat should be
used.
Do any machining on the valve seat location. Cool the
new valve seat down in carbon dioxide snow to
–60 to –70°C, and possibly heat the cylinder head by
hosing it with hot water or other means. Press the
valve seat in with a mandrel.
NOTE! Align the new valve seat correctly, with the
valve chamfer outwards!
You must do the work quickly, so as to maintain the
greatest possible temperature difference.
Machine the seat to the correct angle and width.
Mill or grind the valve seats. A new valve seat must
be ground down so that the distance between the cylinder head plane and the valve head (A), measured
with a new valve, is:
TAMD61/62
TAMD63
TAMD71/72
*Inlet .........
0.7–1.1 mm 0–0.4 mm 2.0–2.4 mm
Exhaust ....
0.7–1.1 mm 0–0.4 mm 1.0–1.4 mm
A used valve seat (wear tolerance) may be ground
down so that the distance between the cylinder head
plane and the valve head (A), measured with a new
valve, is max.:
TAMD61/62
TAMD63
TAMD71/72
Inlet ..........
1.5 mm
1.0 mm
3.0 mm
Exhaust ....
1.5 mm
1.0 mm
2.0 mm
If the distances are greater, the seats should be replaced.
Check the seat angle with a plug gauge for valve
seats, once the valve seat mating surface has been
coated with a thin layer of marking dye.
* To give acceptable renovation service life and economy, the
seat should be replaced when 0.2 mm remains to the maximum
wear tolerance, once the valve seat has been ground.
Valve seat, grinding
Before grinding, the valve guides must be checked
and replaced if the wear limits have been exceeded.
When the valve seats are ground, only remove just
enough material to give the correct shape and a good
mating surface.
Valve and valve seat
43
Repair instructions
Valves, grinding
(does not apply to engines with Nimonic
valves)*
* Note. Nimonic valves must not be ground.
Rocker mechanism,
renovation
Special tools: 6(x) series 9991876, 7(x) series
9992677.
Valve sealing angles:
Inlet: 29.5°
Exhaust: 44.5°
1
Check the valves before grinding them. Cracks and
damage to the valve head or bent valve stems always
mean that the valve must be replaced. Grind the sealing surface as little as possible, just enough to make
it clean all the way round. If the valve head edge is
less than 1.2 mm wide after grinding on the 6(x) series, or 2.0 mm (inlet) and 1.0 mm (exhaust) on the
7(x) series, the valve must be replaced.
Always grind the mating surface in with grinding paste
(even on new valves and seats), and check mating
with indicator dye. If there is any lack of sealing, regrind the seat but not the valve. Then grind the valve
in with grinding paste and do a new check with indicator dye.
Remove the circlips from the rocker shaft and remove
the rockers, bearing journals and springs.
2
Clean the components. Be especially careful with the
oil duct in the bearing journals, and the oil holes in the
rocker shaft and rockers.
Check the distance (A) between the plane of the
cylinder head and the valve head, as in item 1 under
the method for “Valve seat, replacement” on page 42.
3
Check the wear on the rocker shaft and the sealing of
the top hat plugs in the ends of the shaft. Also check
that the spherical part of the rocker arm is not deformed or worn. The threads on the adjustment
screws and locknuts must be undamaged. The hexagon on the locknut must also be in good condition.
The spherical bearing surface of the rocker arm, which
is in contact with the valve/valve cap must not be unevenly worn or pitted. If there is minor wear, this can
be evened off by a grinder. If the rocker shaft hole is
worn oval, the rocker must be replaced.
44
Repair instructions
4
Press out the rocker bushing with mandrel no.
9991967 for the 6(x) series, or 9992677 for the 7(x)
series.
7
Oil the rocker shaft and install all the components.
Note that the rockers on the 6(x) series are installed in
opposing pairs. On the 7(x) series, all the rockers are
identical and the location on the shaft is thus arbitrary.
Make sure that the circlips on the rocker shaft ends
have seated securely in their grooves.
5
Turn the mandrel over and press in a new bushing.
NOTE! Make sure that the oil hole in the bushing is
centred on the oil duct in the rocker arm.
6
Machine broach the bushing to give an accurately adjusted running fit on the shaft.
22.020–22.041 mm for the 6(x) series, or
25.020–25.042 mm for the 7(x) series.
Remove all swarf.
45
Repair instructions
Checking the valve springs
Cylinder head, assembly
Special tools: 9992479, 9996847
1
Clean the mating planes of the cylinder head and cylinder block. Remove any rust or carbon from screw
holes and from the threads for the cylinder head fastening holes. Clean the holes with a tap (M11 x 1.5).
Remove all loosened dirt with a vacuum cleaner or
compressed air.
2
Check the lining heights. Please refer to the values
noted in “Technical Data” in the workshop manual.
The difference in height between the linings under one
and the same cylinder head must not exceed 0.02
mm.
For measurement and adjustment, please refer to
“Cylinder liner position, renovation” on page 59.
3
Check the valve spring lengths, unloaded and when
loaded by a spring tester.
The springs must maintain the values noted in “Technical Data” in the workshop manual.
Dip the cylinder head screws (including the screw
heads) in rust proofer, part no. 282036-3, and allow
them to run off on a piece of netting. The screws
should have stopped dripping when installed (oil could
otherwise be forced up and be regarded as leakage).
WARNING! The screws are phosphated and
must not be cleaned with a steel brush. If the
cylinder head is painted, the contact surfaces
for the cylinder head screws must be free of
paint. The clamping force in the threaded fasteners could otherwise be very poor.
4
Install the seal rings and put the cylinder head gaskets in place. Put the two rear cylinder head screws in
the cylinder blocks and install the cylinder blocks.
46
Repair instructions
5
Torque the cylinder head screws in the numbered sequence in the tightening schedule, four times.
6
1st tightening: 30 Nm (3 kpm)
2nd tightening:
6(x) series: 85 Nm (8.5 kpm)
7(x) series: 90 Nm (9 kpm)
3rd tightening:
6(x) series: 85 Nm (8.5 kpm)
7(x) series: 90 Nm (9 kpm)
Install the push rods and rocker mechanism. Tightening torque: For the 61 series with steel bearing caps,
use 65 Nm (6.5 kpm)
Later versions of the 61 series, and all engines in the
62 and 63 series should have a torque of 50 Nm (5.0
kpm).
The 71 and 72 series engines should have 65 Nm (6.5
kpm).
4th tightening:
Angle tighten the screws 60° in numbered order, as
follows:
Mark up the screw head positions with chalk
marks on the screws and cylinder head. Do not
use a centre punch or scriber, since this could
cause confusion later on.
* The steel bearing cap has been replaced by an aluminium bearing cap as a spare part.
7
Adjust the valve clearance and install the valve
covers, as in the instructions on page 52.
Mark up a 15 mm socket, put the socket as in the
illustration above, i.e. with the sleeve marking displaced one spanner flat anti-clockwise from the
chalk mark.
Then carry out the angle tightening by turning until
the sleeve marking coincides with the chalk mark
on the top of the cylinder head.
Once all screws have been tightened 60°, tightening is completed. No subsequent torquing is necessary.
47
Repair instructions
Copper sleeve for injectors
5
Special tools, 6(x) series: 9812546, 9996400,
9996402, 9996419, 9996421, 9996643, 9996650,
9996651, 9996657, 9996867, 9998070
7(x) series: 9812546, 9996400, 9996402, 9996419,
9996420, 9996643, 9996657, 9996861, 9996867
The copper sleeve can be changed with the cylinder
head either installed or detached.
The seat for the copper sleeve must never be cleaned
up with a cutting tool, with the cylinder head still installed on the engine.
The seat may be cleaned with a nylon brush with the
cylinder head still installed on the engine.
Measures to be taken with the cylinder
head installed
Pull out the steel ring above the copper sleeve. Use
extractor no. 9996419 together with underlay 9996867.
NOTE! To avoid damaging the extractor spindle during
extraction, the spindle must be kept stationary and
tightening must be done with the nut.
It is the nut which must do the work.
The tool can be supplemented by impact hammer
9996400.
1
Drain the coolant (fresh water system).
6
2
Clean round the injectors. Remove the fuel leakage
pipe and fuel supply pipes. Plug the connections.
Remove the valve covers.
Pull the copper sleeve out with extractor no. 9996657.
NOTE! Do not undo the individual pipes. Remove all
the pipes as a package, i.e. all the pipes which are
clamped together.
IMPORTANT! No fuel pipe must be bent or
deformed, since cracks may occur which
would lead to failure.
3
Remove the injector retaining yoke, where the copper
sleeve is to be replaced, and the dust cover over the
injector.
4
First press the extractor sleeve to the base of the
copper sleeve. Hold the extractor still and turn the
spindle anti-clockwise until the tool grasps the copper
sleeve firmly.
Turn the injector with a 15 mm open-ended spanner,
and pull it upwards at the same time. If the injector is
stuck, it must be removed with puller no. 9996643.
48
Repair instructions
7
Cleaning the seat for the
copper sleeve
Method 1 – with a plug brush (installed or
detached cylinder head)
Special tool 9812546
It is very important that all kinds of deposits on the
mating surface in the cylinder head, of the copper
sleeve are removed before a new copper sleeve is installed.
IMPORTANT! For TAMD63, cleaning with
a plug brush is the only permitted method.
When the extractor has grasped the copper sleeve
firmly, insert underlay 9996867 and thread the extractor sleeve over the spindle.
Pull out the copper sleeve by screwing the nut down
at the same time as you hold the spindle still. The tool
can be supplemented by impact hammer 9996400 if
necessary.
Injector and copper sleeve
1
2
3
O-ring
Copper sleeve
Seal ring
4
5
6
Steel ring
Protective ring
Yoke
1
Install plug brush 9812546 in an electric drill with adjustable speed. The maximum speed for the plug
brush is 1000 rpm. Insert the plug brush into the injector hole and clean the seat. Blow clean with compressed air.
8
Check that the O-ring has come up with the copper
sleeve, and that the lower sealing plane is clean.
If the sealing plane is damaged or covered in carbon,
it can either be cleaned with a plug brush (nylon
brush) or with a cutter.
Please refer to methods 1 and 2 under “Cleaning the
seat for the copper sleeve” on this page and overleaf.
Remove the upper seal ring (3). Clean the upper and
lower guides in the cylinder head.
49
Repair instructions
Method 2 – with a cutter (detached
cylinder head)
Copper sleeve, assembly
Special tool: 9996650, 9996651
Special tools, 6(x) series: 9996402, 9996421, 9998070
7(x) series: 9996402, 9996420, 9996861
Cleaning up with a cutter is done in two stages.
Injector and copper sleeve
NOTE! Only use a cutter if absolutely necessary,
since the location of the injector in the cylinder head
is changed each time the seat is re-cut. The cutter
must not be used on the TAMD63, method 1 must
be used instead.
IMPORTANT! The cutter must only be used
when the cylinder head is detached, because
of the risk of getting swarf into the engine.
1
1
2
3
O-ring
Copper sleeve
Seal ring
4
5
6
Steel ring
Protection ring
Yoke
It is important that the steel ring and copper sleeve
are changed at the same time, to give the correct
clearance between the ring and the sleeve. The O-ring
and the upper seal ring should always be replaced by
new ones.
First clean up with cutter no. 9996651 until the cutter
bottoms on the top sealing plane of the seat, and
stops cutting.
The cutter cuts on the surfaces indicated by arrows,
please refer to the illustration.
2
Then continue to clean up with cutter 9996650, until
the cutter bottoms against the cone and stops cutting.
The cutter cuts on the surfaces indicated by arrows,
please refer to the illustration.
1
Coat the upper seal ring (3) with Vaseline or soapy
water and put it in the cylinder head.
Install a new O-ring around the lower guide for the
2
copper cylinder. Put a new steel ring and copper
sleeve on mandrel no. 9996421 (6x series) or 9996420
(7x series).
Guide the mandrel down into the cylinder head.
Check the seal surfaces. If necessary, repeat the
cleaning process. Also check that the upper seal seat
is clean. Blow the cylinder head clean of swarf.
50
Repair instructions
6x-series
6x-series
7x-series
7x-series
3
(6x series): Remove the two fastening screws for the
cylinder head (one on each side of the copper sleeve).
Screw down press tool no. 9998070.
(7x series): Screw down press tool 9996861 with the
injector attachment screws.
Clearance between the copper sleeve and steel ring.
4
Screw down the press tool screw against the mandrel,
and press the steel ring and copper sleeve down by
torquing to 58 Nm (5.8 kpm) with a torque wrench.
Remove the press tool and mandrel.
5
Install mandrel 9996402 and then re-install the press
tool (9998070 or 9996861). Press the copper sleeve
down by torquing the press tool to 58 Nm (5.8 kpm)
with a torque wrench.
NOTE! The steel ring and copper sleeve must be
pressed down in two operations to obtain the correct
press force on the copper sleeve, and the correct
clearance between the ring and sleeve. The clearance
should be 0.10–0.45 mm, please refer to pos (A) on
the illustration above. (6x series) and (7x series).
51
Repair instructions
6
Remove the press tool and mandrel.
(6x series): Install the cylinder head screws and
torque them. Please refer to “Cylinder head, installation” on pages 46 and 47.
7
❍
Exhaust ●
Inlet
Valve location and cylinder numbering
Valve clearance,
Inlet
Install the injectors with dust covers and yokes.
Tightening torque is 50 Nm (5.0 kpm/37 lbf.ft). Install
the valve covers and oil leakage pipes.
8
TAMD61, TAMD62, ............. 0.40 mm
TAMD71
(0.0157”)
0.55 mm
(0.0217”)
TAMD63, TAMD72, ............. 0.50 mm
TAMD73, TAMD74
(0.0197”)
0.65 mm
(0.0256”)
1
Remove the valve covers. When the valve clearance
is checked, the engine must only be cranked in its
normal direction of rotation. Cranking is done by turning the polygon hub on the crankshaft nose with a 21
mm ratchet spanner.
Install the delivery pipes. Check that they have not
been skewed and tighten the nuts.
Tightening torque is 15–25 Nm (1.5 –2.5 kpm/11–18
lbf.ft).
9
Fill up with coolant. Do a leakage check.
Exhaust
Firing sequence
1
5
3
6
2
4
Cylinder whose
rockers “tip”
6
2
4
1
5
3
2
Crank the engine in its normal direction of rotation until the No. 1 piston is at TDC after the compression
stroke. This will cause the valves for cylinder No. 6 to
“tip”.
3
Crank the engine a third of a stroke in the correct direction of rotation, and check the valve clearance for
piston No. 5. At the same time, the valves for cylinder
No. 2 will “tip”. Check the valve clearance for the
other cylinders in the firing sequence.
Valves, adjustment
NOTE! The clearance must never be checked when
the engine is running, it must be done with the engine
stationary, cold or at operating temperature.
52
4
Clean the valve covers, replace damaged gaskets.
Tightening torque for nuts for the valve cover is
24 Nm (2.4 kpm/18 lbf.ft).
Test the engine and check that no oil leakage occurs.
Repair instructions
Cylinder block, renovation
3
Turn the engine round until the relevant piston is at
BDC. Remove the big end bearing cap with the lower
bearing shell.
Piston and connecting rod,
removal
(Cylinder head and sump removed)
4
Special tool: 9996847.
Please refer to “Cylinder head, removal” on pages 32
and 33 for the method of removing the cylinder head.
1
Carefully tap the con rod and piston up until the piston
rings come free of the cylinder liner.
Lift off the piston together with the con rod.
Install retainers 9996847 for the cylinder liners, before
removing the pistons.
If a cylinder liner should slide up during piston removal, the cylinder liner must also be removed since
there is a major risk that contamination will fall down
between the lining and the block, and cause leakage.
5
Remove the piston rings with piston ring pliers.
Please refer to page 54 for inspection of the piston
rings.
2
Remove the piston cooling nozzle.
IMPORTANT! The piston cooling nozzle must
always be removed even if the work could “theoretically” be done with the nozzle in place. There
is a considerable risk that you could knock and
bend the nozzle, which would cause an engine
failure. The lock nuts must not be re-used.
53
Repair instructions
Piston and con. rod, inspection
Removal of piston, small end
bush replacement
Special tools: 9991801, 9992071, 9992479 (7x series),
9992669 (6x series)
Before the small end bush is replaced, the con rod
must be checked for cracking, straightness and twist.
A cracked, bent or twisted con rod must be scrapped.
1
Checking piston wear
Check the pistons for cracks, damaged piston ring
dowels and worn piston ring grooves. If the piston has
deep grooves on the skirt surface, the piston
(liner kit) must be scrapped. Likewise, if the piston
has one or several cracks in the gudgeon pin hole or
in the base of the combustion chamber. Cracks on the
edge of the piston crown around the combustion
chamber are generally of no consequence. Carry out a
crack test by means of the chalk dust test. If any kind
of damage has occurred, the injection equipment must
be checked as well.
Remove the gudgeon pin retaining circlips and press
the gudgeon pin out with mandrel 9992071.
Check the wear on the gudgeon pin. There must not
be any noticeable slack.
The gudgeon should have a light interference fit in the
piston when cold, max. 0.004 mm.
2
NOTE! The cylinder liner wear must be checked before piston rings, small end bushings etc. are replaced.
Please refer to “Cylinder liner, inspection and measurement” on page 57.
Use a new gudgeon pin and measure the con rod in a
jig.
The gudgeon pin may have the following tolerances:
A. Straightness: Max. 0.05 mm per 100 mm length.
B. Twist: Max. 0.1 mm per 100 mm length.
54
Repair instructions
3
Piston assembly
Special tool: 9992071
1
Press the old bush out, using mandrel no. 9992669
(6x series) or 9992479 (7x series). and shaft no.
9991801.
4
Heat the con rod up to about 100°C.
5
Press in the new bush, using the same tool as was
used for extracting the old one. Make sure that the oil
hole in the new bush coincides with the oil duct in the
con rod. Draw a guide line on the bushing hole and the
con rod with a felt tip pen. Check after pressing the
new bush in, that the oil duct is open.
Install one circlip on the piston. Heat the piston up to
about 100°C.
2
Oil the piston, gudgeon pin and small end bush with
engine oil.
6
After pressing, the bush for the
6(x) series should be broached
7(x) series should be bored
3
When the correct fit is achieved, an oiled gudgeon pin
should slowly slide down through the bush under its
own weight (at room temperature).
Finish off by checking the con rod in the jig again, to
ensure that the oil hole is correctly aligned.
Place the piston and con rod so that both the front
marks are aligned in the same direction.
55
Repair instructions
4
During measurement, the ring should be pressed down
below the Bottom Turning point using a piston.
Replace the piston rings if the gap is 1.5 mm or greater.
In general, piston rings should be replaced if there is
any noticeable wear (within the wear tolerances) in the
cylinders, since the piston rings do not normally end
up in the same positions as they had before removal.
Check the piston ring gap on new piston rings as well.
Please refer to “Technical Data” in the Workshop Manual for measurements for each engine variant.
Note. New cylinder liners are supplied complete with
pistons and piston rings.
Press the gudgeon pin in carefully with mandrel no.
992071 and install the second circlip.
NOTE! It should be possible to press the gudgeon pin
in easily, it must not be driven in with a hammer.
Inspection and fit of piston
rings
Piston rings, assembly
Install the piston rings on the piston by means of piston ring pliers.
The oil scraper ring must be installed first, and can be
installed either way up. The expansion spring gap
should be located on the opposite side to the oil
scraper ring gap.*
The compression rings are marked; (the TOP, TOPCD
TOPCX or machined mark) should be at the top.
For a further description of the various versions and
installation locations, please refer to the “Piston ring”
heading on pages 26 and 27.
* White paint marks on the spring should be visible through the
ring gap.
Checking the piston ring gap
Check the wear surfaces and sides. Black spots on
the surface indicate poor contact, and mean that the
piston ring must be replaced.
Oil consumption also has a considerable bearing on
when piston rings should be replaced.
Check the piston ring gap (please refer to the illustration above).
56
Repair instructions
Cylinder liner, inspection and
measurement
Inspection
The cylinder liner should be carefully cleaned before
inspection and measurement. The cylinder liner must
be removed from the cylinder block to permit accurate
crack checking.
3
If the wear is greater than 0.35–0.40 mm, the cylinder
liner with pistons and piston rings should be replaced.
NOTE! The piston and cylinder liner are only supplied
as a complete set as spare parts. The pistons and
cylinder liners are classified and marked with a letter,
C, D or E. This means that a piston marked E must
only be installed with a liner marked E.
IMPORTANT! The position and number of the
cylinder liner must be marked with a felt tip pen
before the liner is removed.
NOTE! Routine removal of the cylinder liner should
not be done unless measurement or other checks indicate that replacement, honing or careful crack checking is necessary.
The Magnaflux method can be used for crack checking.
Measurement
1
Measure the wear on the cylinder liner with a cylinder
indicator. To get the most accurate wear measurement possible, the cylinder indicator should first be
set with a gauge ring or micrometer.
Use the original diameter of the cylinder liner as the
starting value.
Cylinder liner, removal
1
Special tools, 6(x) series: 9996087, 9996394 (2 no.),
9996395 (2 no.), 9996645
7(x) series: 9992178, 9996394 (2 no.), 9996395
(2 no.), 9996645
2
Measure the upper and lower turning points in the cylinder liner, and at several points along the height of
the liner. At each measurement point, the measurement must be done in the transverse and lengthwise
directions of the engine.
Mark up the cylinder liner (cylinder and installation location) if it is to be re-used.
Assemble the extractor with extractor plate 9996087
(6x series) or 9992178 (7x series). Pull out the cylinder liner. Remove the seal rings.
57
Repair instructions
Cylinder liner, honing
Clean the removed cylinder liner from sooty edges.
Set the liner up in a vice.
Use a heavy electric drill which can be operated at low
speed, 200–400 rpm.
Honing pattern on cylinder liner bore
It is important that the cylinder liner should retain its
original honing pattern, for good lubrication and sealing. The liner should therefore be honed if it has surface scratches because of a ring seizure or dirt, or
has bright spots (polishing).
Honing with the cylinder liner in place is not recommended, because of the risk of getting contamination
into the oil ducts and the difficulty of doing the measurements correctly.
The cylinder liners have a honing pattern (see illustration), whose angles are carefully calculated to give the
optimum service life. When the bores are honed in
conjunction with piston ring replacement, the original
pattern should be followed to safeguard lubrication.
The honing scratches must be applied regularly and
cut evenly in both directions and over the entire cylinder.
NOTE! You must maintain the correct speed on the
honing tool to get the correct pattern.
1
58
Use a Flex-Hone® tool with no. 80 grit.
NOTE! Do not use a honing tool with grinding stones,
since these machine the entire surface of the bore.
Lubricate the bore with thin engine oil before and during honing.
After honing, it is very important that the cylinder
liner is carefully cleaned. Use hot water, a brush
and detergent (never paraffin or diesel oil).
Dry the liner with paper or a lint-free cloth. Oil the cylinder liner with thin engine oil after drying.
Flex-Hone® is a registered trade mark of the Brush Research
Manufacturing Co. Inc.
Repair instructions
Cylinder liner seat, renovation
Special tools: 9989876, 9992479, 9996847 (2 No.),
9999508 (7x series), 9999514 (7x series), 9999538
(6x series), 9999553 (6x series)
A damaged cylinder liner seat is repaired by milling
the lining shelf. Check the mating face of the upper
lining seat with marking dye if there is any doubt
about the extent of the damage. The material which is
removed during milling should be compensated
by spacers which are available in thicknesses of
1.12 mm (only 7x series), 0.20 mm, 0.30 mm and
0.50 mm.
NOTE! If spacers are to be used, the lining seats will
have to be machined slightly, even if the seats are undamaged, this is because the fillet radius has to be removed to allow the spacers to seat correctly.
Calculate the thickness of spacers needed, on the basis of the measurements you have made. Try to use
the thinnest possible spacer, preferably only one
should be used. The correct height above the block
plane should be 0.38–0.43 mm.
2
Remove the liner and roughen up the surface of the
lining seat with an emery cloth.
3
Clean the upper and lower lining seats and estimate
the extent of the damage. The upper seat must be absolutely clean from carbon deposits. Clean
the mating surfaces with a brush and cleaning fluid.
Scraping tools must not be used in any circumstances. Blow dry with compressed air.
Screw milling tool no. 9999553 (6x series) or 9999508
(7x series) to the cylinder block.
1
Make sure that the feed sleeve does not press on the
cutter.
4
Screw down the feed sleeve so that it presses the
cutter lightly. Use a T handle (not a ratchet handle) to
turn the cutter.
The cutter should be turned with an even movement,
at the same time as the feed sleeve is turned. When
the correct height has been reached, stop feeding and
turn the cutter a few turns.
Remove the milling tool and clean the liner seat carefully.
Check the mating surface of the lining seat very carefully, and the height of the step edge at regular intervals.
Install the cylinder liner without sealing rings, and
press it down with holder 9996847 (2 No.).
NOTE! Mark the position of the liner against the cylinder block with a felt tip marker pen, so that it comes
back to the same position again.
Measure the height of the liner above the plane of the
block at four different locations, using a dial gauge
and measurement jig 9992479.
59
Repair instructions
Cylinder liner, installation
5
Special tools: 9989876, 9992000, 9992479, 9996847
(2 No.), 9996854
Put any spacers required on the cylinder liner seat.
Lubricate the new seal ring and install it beneath the
liner collar.
1
Remove the old seal rings from the cylinder block and
make sure that the sealing surfaces are carefully
cleaned.
6
Use cleaning fluid and a brass brush.
NOTE! Scraping tools must not be used.
2
If the cylinder liner has not been renovated, install the
cylinder liner without sealing rings and screw it down
with two press tools no. 9996847.
3
Press the cylinder liner down carefully. Use mandrel
no. 9996845 together with handle 9992000.
7
Use press tool no. 9996847, 2 No. to keep the cylinder liner in place.
Measure the height of the liner and estimate the thickness of spacers required as in item 1 of the method
described in “Cylinder liner seat, renovation” on page
59.
4
Lubricate the seal rings to be installed in the cylinder
block with the lubricant provided in the seal ring package.
Install the rings in the grooves in accordance with the
installation instruction provided on the package.
60
Repair instructions
Piston assembly
Special tool: 885126
NOTE! The cylinder liner press tool must be removed
temporarily when tool no. 885126 is used. When the
piston is in place, the press tool must be put back
again.
1
Oil the piston with engine oil.
5
Check that the bearing shells are correctly aligned in
the con rod. Install the cap in accordance with the
marking, and install the screws.
2
⇒
6
Make sure that the press tool is in place, and turn the
crankshaft until the piston comes to its lowest position.
Torque the screws to 190 ± 10 Nm (19 ± 1.0 kpm).
7
Install the piston cooling nozzle.
Make sure that the piston ring openings point in different directions on the piston.
3
⇒
⇒
Oil the big end bearing shells and the gudgeon pin
with engine oil.
Install the bearing shells and check that they are correctly aligned in relation to the con rod and cap.
4
Install the piston and con rod in each cylinder, with
the arrow and “Front” marking pointing forwards.
Use tool no. 885126 to guide the piston rings down
into the cylinder liner.
61
Repair instructions
Timing gear, disassembly
l
Remove the shield plates above the heat exchanger and remove the aftercooler. Remove the
two plastic pipes from the expansion tank.
l
Remove the lid at the front of the thermostat
housing and the connection pipe to the coolant
pump.
l
Remove the coolant pump.
l
Turn the engine round in its normal direction of rotation until the no. 1 piston is at TDC after the
compression stroke (0° on the flywheel).
Special tools: 9992655, 9992658, 9992697
TAMD63
l
Remove the belt tensioner, free the alternator and
hang it up.
l
Remove the alternator bracket.
l
Remove the circulation pump drive gear (4
screws).
Timing gear
1
2
3
4
Crankshaft gear
Idler gear
Oil pump drive gear
Idler gear
5
6
7
8
Injection pump drive gear
Coolant pump drive gear*
Timing gear
Sea water pump drive gear
* Not installed on TAMD63.
NOTE. The work noted under preparatory work does
not need to be done if a complete renovation is going
to be done (removal of all shafts and gears), it only
needs to be done if work is only going to be done on
part of the timing gear.
IMPORTANT! Never turn the crankshaft or camshaft when the timing gears have been removed
and the cylinder head is still in place. The pistons and valves can come into contact with
each other and be damaged.
Preparatory work
TAMD61, TAMD62, TAMD71, TAMD72
l
Free the oil filter and bracket, and hang it up.
Alternatively, the pipes between the engine and
oil filter can be removed. Remove the filter and
bracket. Avoid spilling oil.
l
Remove the oil filling pipe at the front of the engine. Remove the connection pipe to the coolant
pump.
Remove the sea water pump and connection
pipes.
l
Remove the alternator and drive belts. Remove
the alternator brackets, the expansion tank and
the connection pipe to the thermostat housing.
l
Remove the electrical junction box from the expansion tank and hang it up.
62
1
Remove the crankcase pulley, if one is fitted, plus the
torsional damper, which is screwed to the polygon
hub.
IMPORTANT! The torsional damper must not be
subjected to impacts. The damper characteristics can be completely changed if the shape of
the fluid chamber is changed by dents.
Repair instructions
2
5
Remove the idler gear (pos 4)* together with the bearing pin and thrust washer.
6
Remove the polygon hub centre screw, remove the
washer and pull the hub off with tool no. 9992655.
3
Remove the camshaft gear (pos 7)* with extractor no.
999279. Use the same procedure as for the injector
pump drive wheel (pos 5)*.
Remove the timing gear cover.
4
8
Remove the crankshaft gear (pos 1)* with extractor
no. 9992658.
Check that all the markings (centre punch dots) on the
gears coincide. Adjust if necessary by turning the
crankshaft round.
* Please refer to the overview of the timing gears on page 62.
63
Repair instructions
Inspecting the timing gears
Clean the gear wheels and other components in the
timing gear, and inspect them carefully. Replace any
gear wheels which are heavily worn or damaged.
During assembly, all clearances must be checked.
Max. permitted gear flank clearance is 0.17 mm.
Check the radial clearance and end float of the idler
wheel.
End float .................................... 0.05–0.15 mm
Radial clearance ........................ 0.025–0.082 mm
Clean the timing gear cover and the mating surface of
the cover on the engine (timing cover)
Nitrocarburised timing gear wheels
Since some of the timing gear wheels are more heavily loaded in some engine versions than in other versions, the timing gear wheels on these engines are
made to withstand heavier loading, by nitrocarburising
them.
WARNING! Nitrocarburised gears must not
be installed in contact with quenched and
tempered gears.
Always observe the spare part catalogue when replacing gears. If you are not sure about the grade of a
gear, nitrocarburised gears can be recognised by the
following signs:
l
Nitrocarburised gears have a matte grey to yellow/grey colour.
l
The gears are marked with white oil-resistant
paint or have an “N” or NITRO punched on them.
64
Repair instructions
Timing gear, assembly
2
Special tools: 884948, 884949
Check that the camshaft drive gear dowel is installed.
Install the camshaft drive gear.
Tightening torque is 70 Nm (7 kpm)
IMPORTANT! All gear wheels in the timing gear
which are important for timing are marked with a
centre punch mark on the relevant gear tooth or
tooth gap. Also, please note the instructions for
installing nitrocarburised gears on page 64.
3
Tightening torque for timing gear.
90 ±9 Nm
(9 ±0.9
Nm)
Tightening torque for timing gears.
70 ± 7 Nm
(7 ± 0.7 Nm)
33 ±4 Nm
(3.3 ±0.4 Nm)
70 ±7 Nm
(7 ±0.7 Nm)
33 ±4 Nm
(3.3 ±0.4 Nm)
Set the crankshaft up with the no. 1 piston at TDC
(crankshaft key straight up).
1
Install the idler gear in accordance with the markings.
The thrust washer is positioned as in illustration (A).
4
Check that the dowel is installed in the injector pump
shaft (not TAMD63, TAMD72) and install the pump
gear. Check that the markings on the gears coincide.
Note. The injection pump drive gear on the TAMD63
and TAMD72 does not have markings against the idler
gear.
5
Check that the crankshaft key is installed and is correctly seated in the groove.
Check that there are no marks of seizure on the camshaft nose and the polygon hub. Polish off any marks
with emery cloth.
Remove the old seal ring for the polygon hub.
Install the crankshaft gear with tool no. 884948.
Clean the seal ring mating surface.
NOTE! Make sure that the teeth are correctly engaged
in the oil pump drive gear.
Please refer to item 2 of “Seal ring, polygon hub” on
page 66 for instructions about installing the seal ring.
65
Repair instructions
Application of sealant, timing
gear cover
Seal ring, polygon hub,
replacement
(With polygon hub removed)
Special tool: 9996855
1
Remove the old seal ring by means of a screwdriver.
Clean the seal ring mating surface in the lid.
Note. On early model engines, the seal consists of an
inner rubber ring and an outer felt ring. These have
been replaced as spare parts by a rubber seal which
is used on late model engines, i.e. 1 rubber seal is installed.
2
Apply an even, 2 mm wide string of sealant on the
timing gear cover.
Use sealant no. 1161231-4.
NOTE! The timing gear cover must then be installed
and screwed down within 20 minutes.
Install a new seal ring on mandrel 999 6855.
Oil in the seal ring and tap it in until the mandrel
bottoms.
66
Repair instructions
Polygon hub, installation
Camshaft, wear check
Special tool: 884949
Special tools: 998976, 9996772
1
Preparatory work
l
Remove the valve covers. Remove the screws
holding the rocker shaft bearing caps and remove
the rocker mechanism. Lift the push rods out.
Mark the push rods so that they end up in the
same place during re-assembly.
Valve location and cylinder numbering
Lubricate the crankshaft nose with molybdenum disulphide compound. Install the centring section of mandrel no. 884949 (A) on the crankshaft nose.
Heat up the polygon hub to about 100°C. Drive the
hub quickly onto the crankshaft nose (B) until it is
about 5 mm from the plane of the gear wheel.
Remove the tool. Install the washer and centre screw.
Inlet valve
Torque the screw to 200 Nm (20 kpm).
Exhaust valve
Leave the hub to cool and torque the screw to
260 Nm (26 kpm).
Front of engine
m
l
2
Install the torsional damper and crankshaft pulley.
1
Torque the screws to 90 Nm (9 kpm).
Install tool no. 9996772 with two M10x20 screws beside the front valve lifter (cylinder 1 exhaust valve).
Install the dial gauge on the tool.
67
Repair instructions
2
4
Install the push rods in the correct order, install the
rocker support bridges and torque the screws.
Tightening torque: for the 61 series with steel bearing
caps*, torque to 65 Nm (6.5 kpm).
Later models of the 61 series and all engines in the 62
and 63 series have aluminium bearing caps. Tightening torque is 50 Nm (5.0 kpm).
On the 71 and 72 series, the torque used is 65 Nm
(6.5 kpm).
Valve adjustment, please refer to page 52.
* The steel bearing cap has been replaced by an aluminium bearing cap as a spare part.
A
Camshaft, removal
B
Adjust the length of the push rod in the tool, so as to
give a pre-load on the exhaust valve lifter.
Crank the engine until the push rod of the tool is at its
lowest position (A).
Check that the push rod has pre-load and zero the dial
gauge.
Turn the flywheel round until the push rod of the tool is
at its highest position (B).
Special tool: 9998079
Preparatory work
•
Remove the timing gear as in items 6 in the “Timing gear, removal” method on page 62.
Read off the value on the dial gauge.
Note the value.
1
3
Move the measurement tool push rod over to the inlet
valve lifter and do the same measurement.
Move the tool and measure the lift height of each cylinder in turn. None of the values may be less than the
minimum lift height values given in the table below.
Camshaft lift
in mm
Remove the valve covers.
2
2
1
Min lift height
in mm
m inlet l exhaust m inlet l exhaust
6(x) series ...... 8.000
7(x) series ...... 8.006
Lift heights, camshaft
68
Remove the components which cover the valve
lifter access hatch, as in items 1–19 in the
“Cylinder head, removal” method on pages 32
and 33.
8.000
8.268
7.8
7.8
7.8
7.8
Remove the rocker support bridges (1) and con rods
(2).
NOTE! Mark the con rods or put them in a stand so
that they go back in the same places on re-assembly.
Repair instructions
3
Inspection of valve lifters and
camshaft
3
Remove the valve lifter access hatches (3).
NOTE! The centre hatch does not need to be removed.
Inspection of valve lifters
4
4
Use a steel rule to check that the surface of the valve
lifter in contact with the camshaft is spherical (convex). It may even be flat, but it must absolutely not be
concave. If there is visible light showing through the
lifting surface between the ruler and the valve lifter,
the lifter must be replaced.
Remove the valve lifters (4) and mark them so that
they go back in the same places when put back.
NOTE! If the valve lifter is worn right across the valve
lifter, the lifter must be scrapped. The “ditch” shows
that the valve lifter has not rotated. On the other hand,
a dark line at the outside of the valve lifter shows that
the surface has not been worn down.
Investigate the reason why the valve lifter has not rotated before installing a new valve lifter.
5
A
B
5
Minor pitting damage on valve lifter (A), camshaft (B).
Remove the camshaft flange (5).
6
Install tool no. 9998079 on the camshaft and pull it
out carefully.
Check the valve lifters for pitting damage. Pitting
damage can occur for various reasons. The damage
is caused by small particles of metal which come
away from the hardened surface. Valve lifters and
camshafts with minor pitting damage can be re-installed.
69
Repair instructions
It has been found that the damage only gets worse in
very rare cases.
Check the camshaft bearing surface and cam profiles
for wear. The cams can be worn obliquely in the
lengthwise direction, for example.
This can be adjusted in milder cases by stoning the
cam profile. Replace the camshaft if there is any
other damage or wear.
Camshaft bearing,
replacement
The bearings are pressed into their locations and must
be bored after pressing in. This means that the camshaft can only be replaced in conjunction with a total
overhaul of the engine.
When the camshaft is replaced, all the valve
lifters must be replaced at the same time.
Camshaft measurement
Oil holes in bearings
Check when you press the bearings in, that the oil
holes are centred on the corresponding oil duct in the
block.
The front camshaft bearing should be installed with
the groove aligned forwards.
Camshaft measurement
Measure the camshaft bearing surface with a micrometer. The maximum wear and ovality is
0.07 mm.
The straightness of the shaft is checked by indication.
The maximum run-out in relation to the end bearings
is 0.04 mm.
Measure the lift height (cam height) with a calliper
gauge, as in the illustration above.
Lift height C = A – B (The lift height can also be measured by the “Camshaft wear check” method on page
67.
Please refer to “Technical Data” for the measurements
of the camshaft and camshaft bearings. Also, please
refer to the table on page 68 for the lift height.
70
Repair instructions
Camshaft installation
6
1
Install the valve lifter inspection hatches with new
gaskets.
Oil the camshaft bearing surfaces and cam profiles.
Carefully slide the camshaft into place, so as to avoid
damaging the bearings. Use tool no. 9998079.
2
Install the camshaft flange. Torque the screws to
65 Nm (6.5 kpm).
Tightening torque is 24 Nm (2.4 kpm).
NOTE! Put the oil guide plate on the rear hatch.
7
Install the crankcase breather pipe.
8
3
Install the timing gears in accordance with items 1–5
in the “Timing gear, assembly” method on page 65.
Install the timing cover and polygon hub in accordance with the “Application of sealant, timing gear
cover” and “Polygon hub, installation” methods on
pages 66 and 67.
Adjust the valve clearance in accordance with the instruction on page 52.
9
Install the valve covers.
4
Oil the valve lifters and guides in the engine block
with engine oil and put the valve lifters back to their
original locations in the block.
NOTE! If the camshaft is new, new valve lifters must
also be installed. Coat the surface of the valve lifters
in contact with the cam profiles with molybdenum disulphide compound.
Crankshaft removal
(Engine lifted out)
1
Drain or pump out the engine oil.
2
Remove the sump. Remove the oil pump suction and
supply pipes plus the baffle.
5
Put the push rods back in their original positions and
install the rocker mechanism.
Tightening torque: for the 61 series with steel bearing
caps*, the torque is 65 Nm (6.5 kpm).
3
Remove the crankshaft pulley, torsional damper,
polygon hub and timing gear cover.
Please refer to “Timing gear removal” on page 60.
Late model versions of the 61 series and all engines
in the 62 and 63 series have aluminium bearing caps.
These should be torqued to 50 Nm (5.0 kpm).
4
The 71 and 72 series should be torqued to 65 Nm (6.5
kpm).
Remove the reverse gear, the flywheel and the flywheel housing.
* The steel bearing cap has been replaced by an aluminium bearing cap as a spare part.
5
Remove the main bearing and big end bearing caps.
(The oil pump is removed together with the front main
bearing cap).
71
Repair instructions
6
2
Assess any surface damage. The following applies to
nitrocarburised shafts:
Features which would be classed as dirt scratches
on an induction hardened crankshaft may be normal
surface finish on a nitrocarburised crankshaft in
some cases, as on a new crankshaft. On a used
crankshaft, this is emphasized very clearly, because
of the extremely smooth bearing surface.
After a long period of operation, very small particles
may loosen from the surface layer (spalling). This
phenomenon can be confused with dirt scratches,
but differs since the marks do not go round the entire
bearing journal, and they have uneven edges. These
defects do not need to lead to re-grinding the
crankshaft. In general, a light buffing with emery cloth
and new bearing shells is sufficient.
3
Measure the runout of the crankshaft.
Carefully lift the crankshaft out with lifting strops and
a block and tackle.
Inspection, crankshaft and
bearings
The crankshaft is nitrocarburised. A nitrocarburised
shaft has greater fatigue resistance and wear
resistance than an induction hardened shaft. The
crankshaft must be inspected very carefully to avoid
unnecessary renovation.
Check the main bearing shells and big end bearing
shells. Change worn bearing shells or those where
the lead bronze lining is delaminated.
After removal, clean the all the oil ducts in crankshaft
carefully as in the instruction, to find out whether the
crankshaft needs to be renovated.
1
Measure wear and ovality with a micrometer. The
greatest permitted ovality on main and big end
bearings journals is 0.08 mm, max. taper 0.05 mm.
Grind the crankshaft to a suitable underdimension if
these values are exceeded.
72
Put the crankshaft on a pair of V-blocks, which are
placed beneath main bearing journals nos. 1 and 7.
Alternately, the crankshaft can be set up between a
pair of centres. Measurement should be done on the
fourth main bearing journal.
The following values apply to the measured values
(total dial gauge indication):
l
< 0.2 mm: no action unless wear or surface
damage indicates re-grinding.
l
0.2 –0.7 mm: True the crankshaft carefully. Be
careful to avoid over-bending.
NOTE! Do not true more than absolutely necessary.
l
> 0.7 mm: scrap the crankshaft since there is a
damage that cracking will occur during trueing.
4
Do a crack check in accordance with the instruction
below.
Repair instructions
Crack checking
Seizure damage can cause overheating cracks
which can only be discovered with special
equipment. Any cracks and notches are most reliably
found by magnetic powder testing such as
Magnaglo, i.e. fluorescent powder which is observed
in ultra-violet light. Please refer to the instructions
provided by the manufacturers of the equipment.
After such a test, the crankshaft must be de-fluxed.
Cracks of the following types and locations mean that
the crankshaft has to be replaced.
C. Cracks longer than 5 mm adjacent to oil duct
holes. Cracks which are shorter than 5 mm can
be ground off.
A.
Lengthways cracks in bearing journals and
fillets.
D. Cracks longer than 5 mm adjacent to the marked
area. Single cracks shorter than 10 mm can be
accepted.
B.
Crosswise cracks within the marked area.
73
Repair instructions
Crankshaft, renovation
In general, both re-grinding and trueing reduce the
fatigue resistance. So do not re-grind bearing
journals (nitrocarburised in particular) unless there
are strong reasons for doing so. E.g. measurement
faults (wear, ovality, taper) or so serious surface
damage that buffing is not sufficient.
If the crankshaft does not need to be re-aligned
before it is re-ground, it can be ground down to the
second under-dimension before it has to be
nitrocarburised again. If the crankshaft has such
large runout that it has to be re-aligned before
grinding, it should be nitrocarburised again after
grinding.
Work order for renovation
l
True the crankshaft
Grinding the crankshaft
It is essential for a satisfactory result from grinding,
that the correct method has been used. The following
grinding data are recommended.
Grinding wheel: Naxos 33A60 M6VK or 33A46 M6VK
or Norton 33A60 M5VK or 23A46 M5VK.
Diameter: New disk Ø 36"-42" (914–1067 mm). (The
disk can be used down to Ø 720 mm.)
Peripheral speed:
Grinding wheel .................................. 28–33 m/s
Crankshaft .................................... max. 0.25 m/s
Cooling: 3% oil emulsion (soluble). It is important that
cooling is generous, preferably with oil supply from
both above and below.
NOTE! Only true the crankshaft if it is really
necessary, please refer to “Inspection, crankshaft
and bearings” on page 72.
The stone should be sharpened with a single stone
diamond.
l
Do a crack test, please refer to “Crack checking”
on page 73.
Peripheral feed rate ...................... 0.1 mm/revolution
l
Re-grind the crankshaft if necessary, please refer to the next section, and do a new crack test.
Depth of cut ........................................max. 0.03 mm
l
Re-do the nitrocarburisation if the crankshaft has
been trued or if it has been ground to the 3rd
underdimension or more. Nitrocarburisation can
be done with gas or salt, the experience and
methods of every heat treatment craftsman are
applicable.
Side feed ...................................... 0.2 mm/revolution
The following two stages are only applicable if the
crankshaft has been nitrocarburised.
l
Check the runout of the crankshaft again.
l
Do a new crack test.
Finish off renovation by:
l
Buffing the crankshaft carefully after any grinding or repeated nitrocarburisation.
l
Clean the crankshaft carefully from any grinding
residue and other contamination. Rinse and
clean the oil ducts.
Crankshaft radii
74
Repair instructions
The surface finish (profile depth) of bearing surfaces
and fillets is 2 mm, medium surface deviation 5 mm.
This surface finish is achieved by buffing. Buffing is
done in the opposite direction of rotation to grinding.
l
l
Grinding must be done in a crankcase grinding
machine to an underdimension specified in the
“Technical Data” in the workshop manual.
It is very important that the fillet radii have the
correct dimensions:
For piston cooling, a plug* (C) must be installed
underneath the engine block in addition to the
requisite nozzles, centred on the 5:th main bearing,
plus a plug (D) on the left-hand side of the engine
above the rear connection on the block for the flat oil
cooler.
* Note. The plug on early model TAMD61 and TAMD71 (By-pass
valve on TAMD62, TAMD72 and late model versions of TAMD61
and TAMD71).
R = 4.2–4.4 mm (6x series)
R = 3.4–3.6 mm (7x series)
And that they have the correct shape and surface finish.
Measure the radius with a radius template. The
shape must correspond with the “Crankcase radii” on page 74. Grinding steps and sharp edges
must not occur, since these could cause the
crankshaft to break.
l
Special attention must be given to grinding the
centre main bearing journal, because of the
width of the locating bearing “A” in the “Crankshaft radii” illustration on page 74. For dimensions, please refer to “Technical Data” in the
workshop manual.
NOTE! Round off sharp edges which might have
occurred by the oil duct holes when the bearing
journals were ground. Use a grinding bob or emery
cloth.
l
Clean the shaft carefully from grinding residue
and other contamination. Flush and clean the oil
ducts.
Cylinder block seen from the rear
A
Distribution duct – lubrication
B
Distribution duct – piston cooling
C, D
Duct for oil for piston cooling
Cylinder block, inspection
Clean the cylinder block carefully and check the
bearing journals, con rods and bearing caps for
damage.
Check that all oil ways are free from deposits and
that the block does not have any cracks. Small
cracks can be repaired by welding when hot. If
welding is done to the upper plane, the block must be
planed. If there are any major defects, the block must
be replaced.
To permit secure cleaning of the lengthwise oil ways,
spare part cylinder blocks are supplied without top
hat plugs.
NOTE! It is important that the plugs (part no. 950823) are installed once cleaning has been carried out.
Distribution ducts (A) and (B) must always be
plugged at the front and rear of the engine.
Planing the cylinder block
If it is necessary to plane the cylinder block, this can
be done as long as the minimum dimensions noted
under Wear tolerances in “Technical Data” in the
workshop manual are considered. The upper cylinder
block plane on the TAMD63 and TAMD72 must not
be planed since the distance between the cylinder
crowns and valve heads could be too small. The
injector nozzle tips would also come too close.
NOTE! After the upper block plane has been ground,
the piston height above the cylinder block plane must
be checked. Max height: 0.55 mm (61 series) or 0.70
mm (71 series).
75
Repair instructions
Crankshaft, assembly
6
1
Place the bearing shells in their places.
Make sure that bearing shells of the correct
dimensions are installed and that they are correctly
seated in their places.
2
Lubricate the bearing surfaces with engine oil.
3
Check the crankshaft ducts and bearing surfaces.
Lubricate the crankshaft journals with engine oil and
carefully lift the crankshaft into place, using two lifting
strops.
NOTE! Make sure that the marking on the crankshaft
gear and on the idler gear coincide.
4
Move over or install a new crankshaft gear when
the crankshaft is replaced.
Check that the key and key slot are not damaged.
7
Install thrust washers for the centre main bearing
(thrust bearing).
Thanks to the fixing cutouts, the thrust washers can
only be installed one way round.
8
5
Install the main bearing caps and note the markings
carefully.
The markings indicate the bearing cap positions.
9
Oil and install the main bearing cap screws. Torque
the screws to 150±10 Nm (15±1.0 kpm).
Check the end float of the crankshaft.
Maximum end float is 0.4 mm.
Set up the timing gear so that the markings on the
camshaft drive gear, injector drive gear and idler
gear coincide.
NOTE! The injector pump drive gear on the TAMD63
and TAMD72 does not have markings.
10
Install the oil pump and oil pipes.
11
Install the flywheel housing. Please refer to items 2
and 3 in the “Flange seal and flywheel housing”
method on page 83.
76
Repair instructions
12
Big end bearing replacement
Install a new rear crankshaft seal. Please refer to
items 2 and 3 in the “Crankshaft seal, rear” method
on page 83.
(Crankshaft not removed)
Preparatory work
l
Drain or pump out the engine oil.
l
Remove the sump.
13
l
Clean the mating surface of the flywheel against the
crankshaft flange and install the flywheel. Torque the
screws to 190 ± 10 Nm (19 ± 1.0 kpm).
Remove the supply and suction pipes for the oil
pump, plus the baffle.
l
Remove the injectors, to make it easier to crank
the engine.
1
14
Install the timing gear cover with a new string of sealant. Please refer to the “Application of sealant, timing
gear cover” method on page 66.
Turn the crankshaft round until the bearing caps for
cylinders 1 and 6 come into the positions where the
screws can be removed.
2
Remove the bearing caps for con rods 1 and 6.
15
Install the polygon hub, torsional damper and crankcase pulley. Please refer to the “Polygon hub, installation” method on page 67.
NOTE! Make sure that you do not mix up bearing
caps nos. 1 and 6.
3
Remove the bearing shells and clean the bearing locations in the con rods and bearing caps.
16
4
Install the big end bearing caps, be careful with the
markings.
Check the bearing journals and bearing shells for
damage.
The markings specify the location of each bearing
cap.
If the bearing shells have seized, the reason must be
investigated before new bearing shells are installed.
17
5
Torque the bearing cap screws to 190 ± 10 Nm
(19 ± 1.0 kpm).
Check measure the bearing journals with a micrometer which covers the range of 50–75 mm.
18
Max permitted ovality 0.08 mm
Max permitted taper 0.05 mm.
Install the sump and tighten the screws.
Please refer to the tightening sequence for each
engine in “Technical Data” in the workshop manual,
under the “Tightening torque” heading.
If any values exceed the permitted limits, the crankshaft must be removed and repaired.
NOTE! Check “Technical Data” in the workshop
manual to see whether the crankshaft journals have
standard or underdimensions.
19
Check the injector settings and adjust if necessary.
77
Repair instructions
6
Main bearings, replacement
(Crankshaft not removed)
Preparatory work
l
Drain or pump out the engine oil.
l
Remove the sump.
l
Remove the supply and suction pipes for the oil
pump, plus the baffle.
l
Remove the injectors, to make it easier to crank
the engine.
1
Install new bearing shells. Make sure that the guide
pin on the bearing shell is correctly located in the
cutouts in the con rod and bearing cap, and that the
oil holes in the con rods and bearing shells line up.
NOTE! Check “Specifications” in the workshop
manual to ensure that the bearing shells have the
correct dimension.
Remove the main bearing cap screws for the front
main bearing cap (the front main bearing cap is undone together with the oil pump).
2
7
Oil the bearing shells and bearing journals with engine oil. Install the bearing caps in accordance with
the markings and torque the screws to 190 ± 10 Nm
(19 ± 1.0 kpm).
8
Turn the crankshaft until con rods nos. 2 and 5 come
into position, and repeat items 2–7.
9
Turn the crankshaft until con rods nos. 3 and 4 come
into position, and repeat items 2–7.
After you have changed all the big end bearing
shells, turn the crankcase and check that no bearings
run stiff.
78
Turn the crankshaft until the oil hole is free. Put a pin
in the oil supply hole. The pin should be of such a
length that it just pulls the upper bearing shell round
when the crankshaft is turned.
The bearing shell has a heel pressed out which engages in a cutout in the bearing seat in the crankcase. This heel means that the crankshaft must be
rotated in the direction of rotation of the engine
(clockwise) when the bearing shell is rolled out.
Repair instructions
3
7
Clean and check the bearing seat, bearing cap,
bearing journal and bearing shells for damage. If
the bearing shells have seized, the reason must be
investigated before new bearing shells are installed.
Change the other main bearing shells, one at a time,
in the same way as the first one. After you have
changed each main bearing, check that the crankshaft turns easily, by cranking the shaft.
If wear is heavy, or if you suspect that ovality could
be excessive, the crankshaft must be removed for
measurement if you do not have access to crankshaft measuring equipment.
8
4
Check that you have obtained the correct bearing dimension when you replace the bearing shells.
NOTE! If you are at all uncertain, check “Specifications” in the workshop manual to see the overdimensions which can occur.
5
Oil the bearing journals and the new bearing shells.
6
The thrust bearing for the crankshaft is located in
milled grooves in the centre main bearing position.
Check the end float of the crankshaft and replace the
thrust washers if the end float is excessive or if the
washers are damaged. Thrust washers are available
in a large number of overdimensions, please refer to
“Technical data” in the workshop manual.
The end float must not exceed 0.40 mm.
NOTE! When selecting thrust washers, make sure
that the end float is at least 0.16 mm.
The upper bearing shell is installed by turning the
crankcase the opposite way to the normal direction of rotation, with the pin in the hole. Check that
the pressed out heel in the bearing shell engages
correctly in the cutout in the bearing seat. Remove
the pin from the oil hole and install the cap with a
new bearing shell.
Torque the screws to 150 ± 10 Nm (15 ± 1.0 kpm).
79
Repair instructions
9
Flywheel, replacement
1
Use a narrow wood or plastic pin to remove the
thrust washers.
Remove the screws and lift the flywheel away.
Flywheel, inspection
10
When all the main bearing caps have been torqued,
check the crankshaft end float. The end float, measured with a dial gauge, must be 0.16–0.40 mm.
11
Install the oil pump and injectors.
Check the flywheel for cracks and other damage.
Also check that the gear ring is not worn or damaged. Replace the flywheel and gear ring as necessary.
2
Clean the mating surface of the crankshaft flange
against the flywheel.
3
Clean the mating surface of the flywheel against the
crankshaft flange.
4
Check that the flywheel location dowel in the crankshaft is in place and is undamaged.
5
Lift the flywheel into place and install the screws.
6
Torque the flywheel screws to 190 ± 10 Nm (19 ± 1.0
kpm).
80
Repair instructions
Gear ring, replacement
4
(Flywheel removed)
1
Drill 1–2 holes in the gap between two teeth on the
gear ring.
Split the gear ring across the drilled holes, using a
hammer and cold chisel.
Put the heated gear ring on the flywheel and tap it
into place with a soft punch and hammer.
Allow the gear ring to air cool.
2
5
Brush the mating surface of the flywheel with a wire
brush.
Clean the mating surfaces on the flywheel and crankshaft. Check the location dowel in the crankshaft
flange and the rear crankshaft seal. Replace
if necessary.
Install the flywheel. Tightening torque is 190 ± 10 Nm
(19 ± 1.0 kpm).
3
Heat up the new gear ring in an oven, or with a welding torch, to max 180–200°C.
WARNING. If you use a welding torch, take
great care to ensure that the gear ring is evenly
heated, and not spot heated, which would
cause annealing. To check the heating
process, polish the gear ring bright at several
places before heating it. Stop heating when
these surfaces become blued.
81
Repair instructions
Flywheel, indication
Read off the value, and move the dial gauge with
base round to the opposite side of the flywheel.
Special tools: 9999696, 9989876
The value of these measurements must not exceed
0.15 mm.
1
2
Place a dial indicator with its tip on the flywheel.
2
Zero the dial gauge. Turn the flywheel round and
read off the greatest value.
The measured value must not exceed 0.15 mm, at a
measurement radius of 150 mm.
If the flywheel is more skewed, remove the flywheel
and check whether there is dirt or unevenness between the flywheel and the crankshaft flange.
Put the magnetic base of the dial gauge on the flywheel, and put the tip of the dial gauge on the inner
edge of the flywheel housing (see illustration). Pull
the flywheel round and read off the indication.
Centring of the inner edge of the flywheel housing,
relative to the flywheel, must be within 0.25 mm.
If any of the values should exceed 0.25 mm, the location of the flywheel housing against the engine
block should be checked.
Flywheel housing, indication
Special tools: 9999696, 9989876
1
Put the magnetic base of the dial gauge on the flywheel, and put the tip of the dial gauge on the outer
edge of the flywheel housing (see illustration).
82
Repair instructions
Crankshaft seal, rear,
replacement
Flange seal, flywheel housing,
replacement
(Flywheel removed)
(Flywheel removed)
Special tools: 9992000, 9996437
1
1
Remove the four rear screws from the sump, and the
screws which hold the flywheel housing to the cylinder block (10 no.)
Tap the flywheel housing loose, using a plastic faced
hammer, by tapping alternately on the right and left
hand sides.
Tap in one side of the oil seal with a narrow punch.
The other side will then be pressed out and the oil
seal can be extracted by means of a wire hook (illustration), or poked out with a small screwdriver.
2
Clean the mating surface in the flywheel housing and
on the crankshaft.
Oil in the inner edge of the new oil seal with engine
oil. Put some sealant, such as Permatex® No. 3 on
the outside of the oil seal.
3
2
Clean the mating surfaces of the flywheel housing
and cylinder block
Apply an even string (Ø 2 mm) of sealant, Volvo
Penta no. 1161231-4 to the mating surface of the flywheel housing. Install the flywheel housing within
20 minutes after applying the sealant.
3
Tap the oil seal in carefully, using mandrel no.
9996437 and shaft 9992000.
Install the flywheel. Tightening torque is 190 ± 10 Nm
(19 ± 1.0 kpm).
Install and torque the flywheel housing screws to
140 Nm (14 kpm).
Install and torque the sump screws to 24 Nm (2.4
kpm).
83
References to Service Bulletins
Group
No.
Date
Concerning
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7735718-4 English 08–1996